Alexandre Julliard : ole32: Fix wrap-around bug in tick count comparison.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e089295f75cf9db2557418d644c72bc9ba55e70a
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=e089295f75cf9db2557418d644...

Author: Alexandre Julliard <julliard(a)winehq.org>
Date:   Thu Jan 24 15:15:25 2013 +0100

ole32: Fix wrap-around bug in tick count comparison.

---

 dlls/ole32/compobj.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/dlls/ole32/compobj.c b/dlls/ole32/compobj.c
index 630e016..dc2a02b 100644
--- a/dlls/ole32/compobj.c
+++ b/dlls/ole32/compobj.c
@@ -813,14 +813,17 @@ static void apartment_freeunusedlibraries(struct apartment *apt, DWORD delay)
                     real_delay = 0;
             }
 
-            if (!real_delay || (entry->unload_time && (entry->unload_time < GetTickCount())))
+            if (!real_delay || (entry->unload_time && ((int)(GetTickCount() - entry->unload_time) > 0)))
             {
                 list_remove(&entry->entry);
                 COMPOBJ_DllList_ReleaseRef(entry->dll, TRUE);
                 HeapFree(GetProcessHeap(), 0, entry);
             }
             else
+            {
                 entry->unload_time = GetTickCount() + real_delay;
+                if (!entry->unload_time) entry->unload_time = 1;
+            }
         }
         else if (entry->unload_time)
             entry->unload_time = 0;