Removed unreferenced variable

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402477

src/video/wincommon/SDL_wingl.c

@@ -172,7 +172,6 @@ int WIN_GL_SetupWindow(_THIS)
 	int retval;
 #if SDL_VIDEO_OPENGL
 	int i;
-	unsigned int matching;
 	int iAttribs[64];
 	int *iAttr;
 	float fAttribs[1] = { 0 };