fix crash because of NULL command line pointer

Modified: branches/lean-explorer/reactos/subsys/system/explorer/explorer.cpp

--- branches/lean-explorer/reactos/subsys/system/explorer/explorer.cpp	2005-10-09 15:04:18 UTC (rev 18376)
+++ branches/lean-explorer/reactos/subsys/system/explorer/explorer.cpp	2005-10-09 15:12:01 UTC (rev 18377)
@@ -448,7 +448,8 @@

 		cmd._cmdShow = cmdShow;
 
 		 // parse command line options

-		cmd.ParseCmdLine(lpCmdLine);

+		if (lpCmdLine)
+			cmd.ParseCmdLine(lpCmdLine);

 
 		 // Open the first child window after initializing the application
 		if (cmd.IsValidPath())