Get rid of madness about fnmatch: BLI_fnmatch did not do the OS checks, they had to be done in every file using fnmatch (autoexec.c did not, wonder how it could work under unix???).

Thanks to Brecht for noting this!

source/blender/blenlib/BLI_fnmatch.h

@@ -28,6 +28,8 @@
 extern "C" {
 #endif
 
+#if defined WIN32 && !defined _LIBC  || defined __sun
+
 #if defined(__cplusplus) || (defined(__STDC__) && __STDC__)
 #undef  __P
 #define __P(protos) protos
@@ -65,6 +67,13 @@ extern "C" {
 extern int fnmatch __P((const char *__pattern, const char *__string,
                         int __flags));
 
+#else
+#  ifndef _GNU_SOURCE
+#    define _GNU_SOURCE
+#  endif
+#  include <fnmatch.h>
+#endif /* defined WIN32 && !defined _LIBC  || defined __sun */
+
 #ifdef  __cplusplus
 }
 #endif