Squashed 'libretro-common/' changes from c3c0facc97..edffe4d147

edffe4d147 Buildfix for 3DS - implicit declaration of isspace et al.

git-subtree-dir: libretro-common
git-subtree-split: edffe4d1470ae6b846e420392d324c1b2b14281a

libretro-common/streams/file_stream.c

@@ -24,6 +24,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
+#include <ctype.h>
 #include <errno.h>
 
 #ifdef HAVE_CONFIG_H