Fix FoS/Bronjham script.

Fixes issue #1895.

- summon corrupted soul fragment when Corrupt Soul completes.
- update corrupted soul fragment script.
- remove Heroic spell definition. They are defined in SpellDifficulty.dbc.

--HG--
branch : trunk

src/game/Spell.cpp

@@ -3164,6 +3164,9 @@ void Spell::_handle_immediate_phase()
     // process ground
     for (uint32 j = 0; j < 3; ++j)
     {
+        if (m_spellInfo->Effect[j] == 0)
+            continue;
+
         if (EffectTargetType[m_spellInfo->Effect[j]] == SPELL_REQUIRE_DEST)
         {
             if (!m_targets.HasDst()) // FIXME: this will ignore dest set in effect

src/game/SpellAuraEffects.cpp

@@ -5673,6 +5673,9 @@ void AuraEffect::HandleAuraDummy(AuraApplication const * aurApp, uint8 mode, boo
                         case 60244:  // Blood Parrot Despawn Aura
                             target->CastSpell((Unit*)NULL, GetAmount(), true, NULL, this);
                             break;
+                        case 68839: // Corrupt Soul
+                            target->CastSpell(target, 68846, true, NULL, this, GetCasterGUID());
+                            break;
                     }
                     break;
                 case SPELLFAMILY_MAGE: