Core/Spells: Do not apply spellmods to spells with SPELL_ATTR3_NO_DONE_BONUS attribute.

src/server/game/Miscellaneous/SharedDefines.h

@@ -400,7 +400,7 @@ enum SpellAttr3
     SPELL_ATTR3_CAN_PROC_WITH_TRIGGERED          = 0x04000000, // 26 auras with this attribute can proc from triggered spell casts with SPELL_ATTR3_TRIGGERED_CAN_TRIGGER_PROC_2 (67736 + 52999)
     SPELL_ATTR3_DRAIN_SOUL                       = 0x08000000, // 27 only drain soul has this flag
     SPELL_ATTR3_UNK28                            = 0x10000000, // 28
-    SPELL_ATTR3_NO_DONE_BONUS                    = 0x20000000, // 29 Ignore caster spellpower and done damage mods?
+    SPELL_ATTR3_NO_DONE_BONUS                    = 0x20000000, // 29 Ignore caster spellpower and done damage mods?  client doesn't apply spellmods for those spells
     SPELL_ATTR3_DONT_DISPLAY_RANGE               = 0x40000000, // 30 client doesn't display range in tooltip for those spells
     SPELL_ATTR3_UNK31                            = 0x80000000  // 31
 };
@@ -510,7 +510,7 @@ enum SpellAttr6
     SPELL_ATTR6_UNK28                            = 0x10000000, // 28
     SPELL_ATTR6_NO_DONE_PCT_DAMAGE_MODS          = 0x20000000, // 29 ignores done percent damage mods?
     SPELL_ATTR6_UNK30                            = 0x40000000, // 30
-    SPELL_ATTR6_UNK31                            = 0x80000000  // 31
+    SPELL_ATTR6_UNK31                            = 0x80000000  // 31 some special cooldown calc?
 };
 
 enum SpellAttr7

src/server/game/Spells/SpellInfo.cpp

@@ -1156,8 +1156,16 @@ bool SpellInfo::IsAutoRepeatRangedSpell() const
     return AttributesEx2 & SPELL_ATTR2_AUTOREPEAT_FLAG;
 }
 
+bool SpellInfo::IsAffectedBySpellMods() const
+{
+    return !(AttributesEx3 & SPELL_ATTR3_NO_DONE_BONUS);
+}
+
 bool SpellInfo::IsAffectedBySpellMod(SpellModifier* mod) const
 {
+    if (!IsAffectedBySpellMods())
+        return false;
+
     SpellInfo const* affectSpell = sSpellMgr->GetSpellInfo(mod->spellId);
     // False if affect_spell == NULL or spellFamily not equal
     if (!affectSpell || affectSpell->SpellFamilyName != SpellFamilyName)

src/server/game/Spells/SpellInfo.h

@@ -392,6 +392,7 @@ public:
     bool IsRangedWeaponSpell() const;
     bool IsAutoRepeatRangedSpell() const;
 
+    bool IsAffectedBySpellMods() const;
     bool IsAffectedBySpellMod(SpellModifier* mod) const;
 
     bool CanPierceImmuneAura(SpellInfo const* aura) const;