5 files changed, 22 insertions, 14 deletions
diff --git a/engines/glk/alan2/detection.cpp b/engines/glk/alan2/detection.cpp
index d51a109c5e..175c3d61fc 100644
--- a/engines/glk/alan2/detection.cpp
+++ b/engines/glk/alan2/detection.cpp
@@ -46,7 +46,7 @@ Alan2Descriptor Alan2MetaEngine::findGame(const char *gameId) {
 }
 
 bool Alan2MetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &gameList) {
-	const char *const EXTENSIONS[2] = { ".acd", ".dat" };
+	const char *const EXTENSIONS[] = { ".acd", ".dat", nullptr };
 
 	// Loop through the files of the folder
 	for (Common::FSList::const_iterator file = fslist.begin(); file != fslist.end(); ++file) {
@@ -55,8 +55,8 @@ bool Alan2MetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &g
 			continue;
 		Common::String filename = file->getName();
 		bool hasExt = false;
-		for (int idx = 0; idx < 2 && !hasExt; ++idx)
-			hasExt = filename.hasSuffixIgnoreCase(EXTENSIONS[idx]);
+		for (const char *const *ext = &EXTENSIONS[0]; *ext && !hasExt; ++ext)
+			hasExt = filename.hasSuffixIgnoreCase(*ext);
 		if (!hasExt)
 			continue;
 
diff --git a/engines/glk/frotz/detection.cpp b/engines/glk/frotz/detection.cpp
index 2ec48f9087..fbe7126116 100644
--- a/engines/glk/frotz/detection.cpp
+++ b/engines/glk/frotz/detection.cpp
@@ -47,7 +47,8 @@ PlainGameDescriptor FrotzMetaEngine::findGame(const char *gameId) {
 }
 
 bool FrotzMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &gameList) {
-	const char *const EXTENSIONS[11] = { ".z1", ".z2", ".z3", ".z4", ".z5", ".z6", ".z7", ".z8", ".zblorb", ".dat", ".zip" };
+	const char *const EXTENSIONS[] = { ".z1", ".z2", ".z3", ".z4", ".z5", ".z6", ".z7", ".z8",
+		".zblorb", ".dat", ".zip", nullptr };
 
 	// Loop through the files of the folder
 	for (Common::FSList::const_iterator file = fslist.begin(); file != fslist.end(); ++file) {
@@ -56,8 +57,8 @@ bool FrotzMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &g
 			continue;
 		Common::String filename = file->getName();
 		bool hasExt = false;
-		for (int idx = 0; idx < 11 && !hasExt; ++idx)
-			hasExt = filename.hasSuffixIgnoreCase(EXTENSIONS[idx]);
+		for (const char *const *ext = &EXTENSIONS[0]; *ext && !hasExt; ++ext)
+			hasExt = filename.hasSuffixIgnoreCase(*ext);
 		if (!hasExt)
 			continue;
 
diff --git a/engines/glk/glulxe/detection.cpp b/engines/glk/glulxe/detection.cpp
index fb701131ef..09b6e97d0b 100644
--- a/engines/glk/glulxe/detection.cpp
+++ b/engines/glk/glulxe/detection.cpp
@@ -46,7 +46,7 @@ GlulxeDescriptor GlulxeMetaEngine::findGame(const char *gameId) {
 }
 
 bool GlulxeMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &gameList) {
-	const char *const EXTENSIONS[3] = { ".ulx", ".blb", ".gblorb" };
+	const char *const EXTENSIONS[] = { ".ulx", ".blb", ".gblorb", nullptr };
 
 	// Loop through the files of the folder
 	for (Common::FSList::const_iterator file = fslist.begin(); file != fslist.end(); ++file) {
@@ -55,8 +55,8 @@ bool GlulxeMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &
 			continue;
 		Common::String filename = file->getName();
 		bool hasExt = false;
-		for (int idx = 0; idx < 3 && !hasExt; ++idx)
-			hasExt = filename.hasSuffixIgnoreCase(EXTENSIONS[idx]);
+		for (const char *const *ext = &EXTENSIONS[0]; *ext && !hasExt; ++ext)
+			hasExt = filename.hasSuffixIgnoreCase(*ext);
 		if (!hasExt)
 			continue;
 
diff --git a/engines/glk/magnetic/detection.cpp b/engines/glk/magnetic/detection.cpp
index 91d63ccace..f7021065bc 100644
--- a/engines/glk/magnetic/detection.cpp
+++ b/engines/glk/magnetic/detection.cpp
@@ -46,7 +46,7 @@ MagneticDescriptor MagneticMetaEngine::findGame(const char *gameId) {
 }
 
 bool MagneticMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &gameList) {
-	const char *const EXTENSIONS[1] = { ".magnetic" };
+	const char *const EXTENSIONS[] = { ".magnetic", nullptr };
 
 	// Loop through the files of the folder
 	for (Common::FSList::const_iterator file = fslist.begin(); file != fslist.end(); ++file) {
@@ -55,8 +55,8 @@ bool MagneticMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames
 			continue;
 		Common::String filename = file->getName();
 		bool hasExt = false;
-		for (int idx = 0; idx < 1 && !hasExt; ++idx)
-			hasExt = filename.hasSuffixIgnoreCase(EXTENSIONS[idx]);
+		for (const char *const *ext = &EXTENSIONS[0]; *ext && !hasExt; ++ext)
+			hasExt = filename.hasSuffixIgnoreCase(*ext);
 		if (!hasExt)
 			continue;
 
diff --git a/engines/glk/scott/detection.cpp b/engines/glk/scott/detection.cpp
index 30feb59e37..c41825140c 100644
--- a/engines/glk/scott/detection.cpp
+++ b/engines/glk/scott/detection.cpp
@@ -44,14 +44,21 @@ PlainGameDescriptor ScottMetaEngine::findGame(const char *gameId) {
 }
 
 bool ScottMetaEngine::detectGames(const Common::FSList &fslist, DetectedGames &gameList) {
+	const char *const EXTENSIONS[] = { ".saga", ".dat", ".blb", ".blorb", nullptr };
 	Common::File gameFile;
 	Common::String md5;
 
 	// Loop through the files of the folder
 	for (Common::FSList::const_iterator file = fslist.begin(); file != fslist.end(); ++file) {
 		Common::String name = file->getName();
-		if (file->isDirectory() || !(name.hasSuffixIgnoreCase(".saga")
-				|| name.hasSuffixIgnoreCase(".dat") || name.hasSuffixIgnoreCase(".blb")))
+		if (file->isDirectory())
+			continue;
+
+		Common::String filename = file->getName();
+		bool hasExt = false;
+		for (const char *const *ext = &EXTENSIONS[0]; *ext && !hasExt; ++ext)
+			hasExt = filename.hasSuffixIgnoreCase(*ext);
+		if (!hasExt)
 			continue;
 
 		if (gameFile.open(*file)) {