Updated version to 1.2.13

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402664

include/SDL_version.h

@@ -37,7 +37,7 @@ extern "C" {
 */
 #define SDL_MAJOR_VERSION	1
 #define SDL_MINOR_VERSION	2
-#define SDL_PATCHLEVEL		12
+#define SDL_PATCHLEVEL		13
 
 typedef struct SDL_version {
 	Uint8 major;