Fixed compiler warnings with SDL_FORCE_INLINE on gcc2. (Thanks, Axel!)
Fixes Bugzilla #1770.
--- a/include/begin_code.h Tue Mar 26 22:26:07 2013 -0700
+++ b/include/begin_code.h Fri Mar 29 21:13:16 2013 -0400
@@ -130,7 +130,7 @@
#if defined(_MSC_VER)
#define SDL_FORCE_INLINE __forceinline
-#elif defined(__GNUC__) || defined(__clang__)
+#elif ( (defined(__GNUC__) && (__GNUC__ >= 4)) || defined(__clang__) )
#define SDL_FORCE_INLINE __attribute__((always_inline)) static inline
#else
#define SDL_FORCE_INLINE static __inline__