Properly return command table every time it is called, rather then just the first time.

Fixes the issue with .command showing the wrong information.
Fixes issue 3459.

--HG--
branch : trunk

src/server/game/Chat/Chat.cpp

@@ -778,8 +778,6 @@ ChatCommand * ChatHandler::getCommandTable()
 
     if (load_command_table)
     {
-        load_command_table = false;
-
         QueryResult_AutoPtr result = WorldDatabase.Query("SELECT name,security,help FROM command");
         if (result)
         {