ALL: Avoid using is* macros from ctype.h

On some systems, passing signed chars to macros like isspace() etc. lead
to a runtime error. Hence, mark these macros as forbidden by default,
and introduce otherwise equivalent alternatives for them.

1 files changed, 1 insertions, 1 deletions

diff --git a/engines/hugo/util.cpp b/engines/hugo/util.cpp
index 6dc9890c3a..1428fc93a3 100644
--- a/engines/hugo/util.cpp
+++ b/engines/hugo/util.cpp
@@ -119,7 +119,7 @@ char *strlwr(char *buffer) {
 	char *result = buffer;
 
 	while (*buffer != '\0') {
-		if (isupper(static_cast<unsigned char>(*buffer)))
+		if (isUpper(*buffer))
 			*buffer = tolower(*buffer);
 		buffer++;
 	}