From 8a6126e90d9ca8d1b9055c1af25c4bd9b89431c0 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Sat, 11 Aug 2007 21:42:36 +0000
Subject: [PATCH] Whoops, it's not quite that easy - fixed bug in
 SDL_ClearDirtyRects()

---
 src/video/SDL_rect.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/video/SDL_rect.c b/src/video/SDL_rect.c
index cb9ef998e..9265d60e1 100644
--- a/src/video/SDL_rect.c
+++ b/src/video/SDL_rect.c
@@ -149,7 +149,20 @@ SDL_AddDirtyRect(SDL_DirtyRectList * list, const SDL_Rect * rect)
 void
 SDL_ClearDirtyRects(SDL_DirtyRectList * list)
 {
-    list->free = list->list;
+    SDL_DirtyRect *prev, *curr;
+
+    /* Skip to the end of the free list */
+    prev = NULL;
+    for (curr = list->free; curr; curr = curr->next) {
+        prev = curr;
+    }
+
+    /* Add the list entries to the end */
+    if (prev) {
+        prev->next = list->list;
+    } else {
+        list->free = list->list;
+    }
     list->list = NULL;
     list->count = 0;
 }