Fix demo command file completion

code/qcommon/cmd.c

@@ -848,7 +848,7 @@ Cmd_CompleteCfgName
 */
 void Cmd_CompleteCfgName( char *args, int argNum ) {
 	if( argNum == 2 ) {
-		Field_CompleteFilename( "", "cfg", qfalse, qtrue );
+		Field_CompleteFilename( "", "cfg", NULL, qfalse, qtrue );
 	}
 }