[svn] * Avoid access to bag item prototype for getting bag size, use related item update field instead as more fast source.

* Better check client inventory pos data received in some client packets to skip invalid cases.
* Removed some unnecessary database queries.
* Make guid lookup for adding ignore async.
* Added two parameter versions of the AsyncQuery function
* Make queries for adding friends async. - Hunuza
* Replace some PQuery() calls with more simple Query() - Hunuza
* Mark spell as executed instead of deleteable to solve crash.
*** Source mangos.

**Its a big commit. so test with care... or without care.... whatever floats your boat.

--HG--
branch : trunk

src/game/SkillDiscovery.cpp

@@ -54,7 +54,7 @@ void LoadSkillDiscoveryTable()
     uint32 count = 0;
 
     //                                                 0        1         2
-    QueryResult *result = WorldDatabase.PQuery("SELECT spellId, reqSpell, chance FROM skill_discovery_template");
+    QueryResult *result = WorldDatabase.Query("SELECT spellId, reqSpell, chance FROM skill_discovery_template");
 
     if (result)
     {