[8408] Optimized guild_member loading during startup. Changed rank ids in guild_rank table.

First start of mangos will take more time then usually, because of guild_rank change. If you want to speed first start up, execute command:
    UPDATE guild_rank SET rid = rid - 1;

    Signed-off-by: Triply <triply@getmangos.com>

--HG--
branch : trunk

src/game/WorldSession.cpp

@@ -368,7 +368,7 @@ void WorldSession::LogoutPlayer(bool Save)
         Guild *guild = objmgr.GetGuildById(_player->GetGuildId());
         if(guild)
         {
-            guild->LoadPlayerStatsByGuid(_player->GetGUID());
+            guild->SetMemberStats(_player->GetGUID());
             guild->UpdateLogoutTime(_player->GetGUID());
 
             WorldPacket data(SMSG_GUILD_EVENT, (1+1+12+8)); // name limited to 12 in character table.