[PATCH 6/6] winemac.drv: Restore check to skip a window update when it is closing.

[Tim Clem]

This restores the check from 6bb537c8b0c that was partially reverted
along with 9e599a89e30.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52231
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52354
Signed-off-by: Tim Clem 
---
 dlls/winemac.drv/cocoa_window.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/winemac.drv/cocoa_window.m b/dlls/winemac.drv/cocoa_window.m
index 5cf2ae6bc25..54189c251d4 100644
--- a/dlls/winemac.drv/cocoa_window.m
+++ b/dlls/winemac.drv/cocoa_window.m
@@ -494,7 +494,7 @@ - (void) drawRect:(NSRect)rect
             NSRectFill(rect);
         }

-        if (window.surface && window.surface_mutex &&
+        if (!window.closing && window.surface && window.surface_mutex &&
             !pthread_mutex_lock(window.surface_mutex))
         {
             const CGRect* rects;