From d8f9be64d88462b8181651b47d8ad5ccc092837d Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Tue, 30 Jul 2013 20:57:26 -0700
Subject: [PATCH] Check for negative source rectangle in SDL_SoftBlit() (thanks
 John!)

---
 src/video/SDL_blit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/video/SDL_blit.c b/src/video/SDL_blit.c
index 78e449dd0..7b4f9edc9 100644
--- a/src/video/SDL_blit.c
+++ b/src/video/SDL_blit.c
@@ -61,7 +61,7 @@ SDL_SoftBlit(SDL_Surface * src, SDL_Rect * srcrect,
     }
 
     /* Set up source and destination buffer pointers, and BLIT! */
-    if (okay && srcrect->w && srcrect->h) {
+    if (okay && !SDL_RectEmpty(srcrect)) {
         SDL_BlitFunc RunBlit;
         SDL_BlitInfo *info = &src->map->info;