Replace some PQuery/PExecute by more simple Query/Execute

Original patch by hunuza, extended to whole code
Closses issue 1446

--HG--
branch : trunk

src/game/ObjectMgr.cpp

@@ -8943,7 +8943,7 @@ void ObjectMgr::LoadGMTickets()
 
     } while (result->NextRow());
 
-    result = CharacterDatabase.PQuery("SELECT MAX(guid) from gm_tickets");
+    result = CharacterDatabase.Query("SELECT MAX(guid) from gm_tickets");
 
     if (result)
     {