From 275689eb6d5928fd00f4d90b92eee2707cf05203 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Sun, 30 Oct 2005 05:45:46 +0000
Subject: [PATCH] Prevent division-by-zero in WarpMouse if surface's pitch is
 zero (a GL surface?).

---
 src/video/SDL_cursor.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/video/SDL_cursor.c b/src/video/SDL_cursor.c
index 2987db1aa..115fae111 100644
--- a/src/video/SDL_cursor.c
+++ b/src/video/SDL_cursor.c
@@ -303,9 +303,14 @@ void SDL_WarpMouse (Uint16 x, Uint16 y)
 	}
 
 	/* If we have an offset video mode, offset the mouse coordinates */
-	x += (this->screen->offset % this->screen->pitch) /
-	      this->screen->format->BytesPerPixel;
-	y += (this->screen->offset / this->screen->pitch);
+	if (this->screen->pitch == 0) {
+		x += this->screen->offset / this->screen->format->BytesPerPixel;
+		y += this->screen->offset;
+	} else {
+		x += (this->screen->offset % this->screen->pitch) /
+		      this->screen->format->BytesPerPixel;
+		y += (this->screen->offset / this->screen->pitch);
+	}
 
 	/* This generates a mouse motion event */
 	if ( video->WarpWMCursor ) {