--- tuxmath_w_fonts-2.0.1/src/titlescreen.c~	2011-04-11 05:05:58.000000000 +0200
+++ tuxmath_w_fonts-2.0.1/src/titlescreen.c	2015-07-24 05:48:03.385868605 +0200
@@ -50,7 +50,7 @@
 SDL_Color bright_green;
 
 // Type needed for trans_wipe():
-struct blit {
+static struct blit {
     SDL_Surface *src;
     SDL_Rect *srcrect;
     SDL_Rect *dstrect;