[mf] 18378: fix crash because of NULL command line pointer

fix crash because of NULL command line pointer
Modified: trunk/reactos/subsys/system/explorer/explorer.cpp
  _____

Modified: trunk/reactos/subsys/system/explorer/explorer.cpp
--- trunk/reactos/subsys/system/explorer/explorer.cpp	2005-10-09
15:12:01 UTC (rev 18377)
+++ trunk/reactos/subsys/system/explorer/explorer.cpp	2005-10-09
15:12:13 UTC (rev 18378)
@@ -561,7 +561,8 @@

cmd._cmdShow = cmdShow;

// parse command line options, which may overwrite the MDI flag
-	cmd.ParseCmdLine(lpCmdLine);
+	if (lpCmdLine)
+		cmd.ParseCmdLine(lpCmdLine);

// create main window
    MainFrameBase::Create(cmd);