Fix Bug 1217 with patch from bugzila by  ravelo  "If you type > or < in cmd and hit ENTER, cmd.exe crashes"

Modified: trunk/reactos/subsys/system/cmd/cmd.c

--- trunk/reactos/subsys/system/cmd/cmd.c	2005-12-29 21:45:17 UTC (rev 20441)
+++ trunk/reactos/subsys/system/cmd/cmd.c	2005-12-29 21:46:40 UTC (rev 20442)
@@ -1385,9 +1385,10 @@

 			tmp = commandline;
 			tmp += _tcsspn(tmp,_T(" \t"));
 			/* first we find and skip and pre-redirections... */

-			while ( _tcschr(_T("<>"),*tmp)

+			while (( tmp ) &&
+				( _tcschr(_T("<>"),*tmp)

 				|| !_tcsncmp(tmp,_T("1>"),2)

-				|| !_tcsncmp(tmp,_T("2>"),2) )

+				|| !_tcsncmp(tmp,_T("2>"),2) ))

 			{
 				if ( _istdigit(*tmp) )
 					tmp += 2;
@@ -1402,7 +1403,8 @@

 				}
 				else
 					tmp = _tcspbrk(tmp,_T(" \t"));

-				tmp += _tcsspn(tmp,_T(" \t"));

+				if ( tmp )
+					tmp += _tcsspn(tmp,_T(" \t"));

 			}
 			/* we should now be pointing to the actual command
 			 * (if there is one yet)*/