*Check proc chance of "improved shadowform". By Den

--HG--
branch : trunk

src/game/Unit.cpp

@@ -5691,6 +5691,9 @@ bool Unit::HandleDummyAuraProc(Unit *pVictim, uint32 damage, AuraEffect* trigger
                 case 47570:
                 case 47569:
                 {
+                    if (!roll_chance_i(triggerAmount))
+                        return false;
+
                     RemoveMovementImpairingAuras();
                     break;
                 }