[PATCH 3/3] Check for edit window to be here in case of destruction during handler execution.

[Nikolay Sivov]

A problem shows up for example if we destroy window after WM_COMMAND notification,
returning from WM_COMMAND sending call edit contents will be lost already and
trying to unlock buffer will lead to reading freed memory at least.
---
 dlls/user32/edit.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/dlls/user32/edit.c b/dlls/user32/edit.c
index f4143b1..b512aa4 100644
--- a/dlls/user32/edit.c
+++ b/dlls/user32/edit.c
@@ -5390,7 +5390,7 @@ static LRESULT EditWndProc_common( HWND hwnd, UINT msg,
 		break;
 	}
 
-	if (es) EDIT_UnlockBuffer(es, FALSE);
+	if (IsWindow(hwnd) && es) EDIT_UnlockBuffer(es, FALSE);
 
         TRACE("hwnd=%p msg=%x (%s) -- 0x%08lx\n", hwnd, msg, SPY_GetMsgName(msg, hwnd), result);
 
-- 
1.5.6.5


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