Forgot to reshow mouse cursor when exiting grab/hide mode

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402071

src/video/gem/SDL_gemmouse.c

@@ -181,5 +181,6 @@ void GEM_CheckMouseMode(_THIS)
 		GEM_mouse_relative = SDL_TRUE;
 	} else {
 		GEM_mouse_relative = SDL_FALSE;
+		graf_mouse(M_ON, NULL);
 	}
 }