ALL: Make simpleSaveNames() a MetaEngineFeature

Added it into hasFeature() of all engines which returned `true` in
simpleSaveNames() before.

As mentioned in #788, SCI is not always using simple names, so it
doesn't have such feature now.

3 files changed, 2 insertions, 4 deletions

diff --git a/engines/prince/detection.cpp b/engines/prince/detection.cpp
index 1c6f63aff3..ad759823d8 100644
--- a/engines/prince/detection.cpp
+++ b/engines/prince/detection.cpp
@@ -56,7 +56,8 @@ bool PrinceMetaEngine::hasFeature(MetaEngineFeature f) const {
 		(f == kSavesSupportThumbnail) ||
 		(f == kSavesSupportCreationDate) ||
 		(f == kSupportsListSaves) ||
-		(f == kSupportsLoadingDuringStartup);
+		(f == kSupportsLoadingDuringStartup) ||
+		(f == kSimpleSavesNames);
 }
 
 bool Prince::PrinceEngine::hasFeature(EngineFeature f) const {
diff --git a/engines/prince/detection.h b/engines/prince/detection.h
index 39cfdd96e7..3076253cf5 100644
--- a/engines/prince/detection.h
+++ b/engines/prince/detection.h
@@ -121,7 +121,6 @@ public:
 	virtual bool hasFeature(MetaEngineFeature f) const;
 	virtual int getMaximumSaveSlot() const;
 	virtual SaveStateList listSaves(const char *target) const;
-	virtual bool simpleSaveNames() const;
 	SaveStateDescriptor querySaveMetaInfos(const char *target, int slot) const;
 	virtual void removeSaveState(const char *target, int slot) const;
 };
diff --git a/engines/prince/saveload.cpp b/engines/prince/saveload.cpp
index 2855bdc4bd..d3360badd1 100644
--- a/engines/prince/saveload.cpp
+++ b/engines/prince/saveload.cpp
@@ -105,8 +105,6 @@ SaveStateList PrinceMetaEngine::listSaves(const char *target) const {
 	return saveList;
 }
 
-bool PrinceMetaEngine::simpleSaveNames() const { return true; }
-
 SaveStateDescriptor PrinceMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
 	Common::String fileName = Common::String::format("%s.%03d", target, slot);
 	Common::InSaveFile *f = g_system->getSavefileManager()->openForLoading(fileName);