[svn] Remove isVisible function. Check stealth and invisible in canAttack();

Use new remove aura by interrupt flag function.

--HG--
branch : trunk

src/game/SpellEffects.cpp

@@ -3477,7 +3477,7 @@ void Spell::EffectPickPocket(uint32 /*i*/)
         else
         {
             // Reveal action + get attack
-            m_caster->RemoveInterruptableAura(AURA_INTERRUPT_FLAG_STEALTH);
+            m_caster->RemoveAurasWithInterruptFlags(AURA_INTERRUPT_FLAG_STEALTH);
             if (((Creature*)unitTarget)->AI())
                 ((Creature*)unitTarget)->AI()->AttackStart(m_caster);
         }