added return of first sent items guid

- get the guid of the first item generated in the mail and return it to lua

- declaration of mailGUID to check if data was already pushed to lua in a previous walkthrough of the while loop, in case there are multiple items added

GlobalMethods.h

@@ -2128,6 +2128,7 @@ namespace LuaGlobalFunctions
         SQLTransaction trans = CharacterDatabase.BeginTransaction();
 #endif
         uint8 addedItems = 0;
+        uint32 mailGUID = 0;
         while (addedItems <= MAX_MAIL_ITEMS && i + 2 <= argAmount)
         {
             uint32 entry = Eluna::CHECKVAL<uint32>(L, ++i);
@@ -2156,6 +2157,13 @@ namespace LuaGlobalFunctions
                 item->SaveToDB();
 #endif
                 draft.AddItem(item);
+
+                if (!mailGUID > 0)
+                {
+                    mailGUID = item->GetGUIDLow();
+                    Eluna::Push(L, mailGUID);
+                }
+
                 ++addedItems;
             }
         }
@@ -2167,7 +2175,7 @@ namespace LuaGlobalFunctions
 #else
         draft.SendMailTo(MailReceiver(receiverPlayer, MAKE_NEW_GUID(receiverGUIDLow, 0, HIGHGUID_PLAYER)), sender);
 #endif
-        return 0;
+        return 1;
     }
 
     /**