Make the current revision number available

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403444

include/SDL_version.h

@@ -30,6 +30,7 @@
 #define _SDL_version_h
 
 #include "SDL_stdinc.h"
+#include "SDL_revision.h"
 
 #include "begin_code.h"
 /* Set up for C function definitions, even when using C++ */
@@ -131,6 +132,12 @@ typedef struct SDL_version
  */
 extern DECLSPEC void SDLCALL SDL_GetVersion(SDL_version * ver);
 
+/**
+ * \fn int SDL_GetRevision()
+ * \brief Get the code revision of SDL that is linked against your program.
+ */
+extern DECLSPEC int SDLCALL SDL_GetRevision();
+
 /* Ends C function definitions when using C++ */
 #ifdef __cplusplus
 /* *INDENT-OFF* */