-Fix litetree compatibility with 2.3 images

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@5993 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/xcat/plugins/litetree.pm

@@ -70,7 +70,10 @@ sub process_request {
 	# if request comes from node post script .awk file.
 	}elsif($request->{'_xcat_clienthost'}){
 		my @nodenames = noderange($request->{'_xcat_clienthost'}->[0].",".$request->{'_xcat_clientfqdn'}->[0]);
-		$noderange = \@nodenames;
+        if (@nodenames) {
+    		$noderange = \@nodenames;
+            $request->{node} = $noderange;
+        }
 	}else{
 		$callback->({error=>["Well Kemosabi, I can't figure out who you are."],errorcode=>[1]});
 		return;