*Add some more comments to SpellScript methods

*Remove forgotten error log

--HG--
branch : trunk

src/server/game/Spells/Spell.cpp

@@ -7097,7 +7097,7 @@ void Spell::SelectTrajTargets()
 
 void Spell::LoadScripts()
 {
-    sLog.outError("Spell::LoadScripts");
+    sLog.outDebug("Spell::LoadScripts");
     sScriptMgr.CreateSpellScripts(m_spellInfo->Id, m_loadedScripts);
     for(std::list<SpellScript *>::iterator itr = m_loadedScripts.begin(); itr != m_loadedScripts.end() ;)
     {

src/server/game/Spells/SpellScript.h

@@ -124,11 +124,18 @@ class SpellScript : public _SpellScript
         Unit * GetCaster();
         Unit * GetOriginalCaster();
         SpellEntry const * GetSpellInfo();
+
         // functions useable only during spell hit on target phase
-        Unit * GetEffectUnitTarget();
+        
+        // returns: target of current effect if it was Unit otherwise NULL
+        Unit * GetEffectUnitTarget(); 
+        // returns: target of current effect if it was Creature otherwise NULL
         Creature * GetEffectCreatureTarget();
+        // returns: target of current effect if it was Player otherwise NULL
         Player * GetEffectPlayerTarget();
+        // returns: target of current effect if it was Item otherwise NULL
         Item * GetEffectItemTarget();
+        // returns: target of current effect if it was GameObject otherwise NULL
         GameObject * GetEffectGOTarget();
         int32 GetEffectValue();
 };