Firewall: reaktivated targetport-check. now there's an errromessage in case of wrong portnumber

html/cgi-bin/firewall.cgi

@@ -659,6 +659,8 @@ sub checktarget
 							if (&General::validport($_)){
 								push (@values,$_);
 							}else{
+								$errormessage=$Lang::tr{'fwdfw err tgt_port'};
+								return $errormessage;
 							}
 						}
 					}