Handle proc == NULL in THUNK_SetDCHook correctly.
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@ -535,7 +535,9 @@ BOOL16 WINAPI THUNK_SetDCHook( HDC16 hdc, FARPROC16 proc, DWORD dwHookData )
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defDCHookProc = (FARPROC16)-1;
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defDCHookProc = (FARPROC16)-1;
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}
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}
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if (proc != defDCHookProc)
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if (!proc)
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thunk = NULL;
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else if (proc != defDCHookProc)
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{
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{
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thunk = THUNK_Alloc( proc, (RELAY)CallTo16_word_wwll );
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thunk = THUNK_Alloc( proc, (RELAY)CallTo16_word_wwll );
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if (!thunk) return FALSE;
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if (!thunk) return FALSE;
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