Update prototype in surface.c to fix xcode build after last change.
--- a/test/automated/surface/surface.c Sat Dec 01 23:30:53 2012 -0800
+++ b/test/automated/surface/surface.c Sat Dec 01 23:42:17 2012 -0800
@@ -27,7 +27,7 @@
/* Testcases. */
static void surface_testLoad( SDL_Surface *testsur );
static void surface_testBlit( SDL_Surface *testsur );
-static int surface_testBlitBlendMode( SDL_Surface *testsur, SDL_Surface *face, int mode );
+static int surface_testBlitBlendMode( SDL_Surface *testsur, SDL_Surface *face, SDL_BlendMode bMode );
static void surface_testBlitBlend( SDL_Surface *testsur );