[WINESYNC][COMCTL32] Fix Exception in PROPSHEET_DoCommand (reactos#7943)

CORE-20036

Import Wine commit:
comctl32: Avoid segfault in PROPSHEET_DoCommand when psInfo is NULL.
wine commit id affd5177bba907a015d1c6fc8ac9970731125268 by Yuri Hérouard <[email protected]>

Author: valina354

dll/win32/comctl32/propsheet.c

@@ -3255,6 +3255,10 @@ static BOOL PROPSHEET_DoCommand(HWND hwnd, WORD wID)
 		{
                     PropSheetInfo* psInfo = GetPropW(hwnd, PropSheetInfoStr);
 
+#ifdef __REACTOS__
+                    if (psInfo == NULL) break;
+#endif
+
                     /* don't overwrite ID_PSRESTARTWINDOWS or ID_PSREBOOTSYSTEM */
                     if (psInfo->result == 0)
                         psInfo->result = IDOK;