Free cache DCEs if the DC gets deleted.

objects/dc.c

diff --git a/objects/dc.c b/objects/dc.c
index be38bf0..24b16ef 100644
--- a/objects/dc.c
+++ b/objects/dc.c
@@ -745,7 +745,7 @@
             DWORD data = dc->dwHookData;
             GDI_ReleaseObj( hdc );
             if (!proc( hdc, DCHC_DELETEDC, data, 0 )) return FALSE;
-            if (!(dc = DC_GetDCPtr( hdc ))) return FALSE;
+            if (!(dc = DC_GetDCPtr( hdc ))) return TRUE;  /* deleted by the hook */
         }
     }