Core: Fix non-PCH build + clean up some sporadic warnings

src/server/game/Spells/Auras/SpellAuras.cpp

@@ -1752,7 +1752,7 @@ bool Aura::IsProcOnCooldown() const
     return false;
 }
 
-void Aura::AddProcCooldown(uint32 msec)
+void Aura::AddProcCooldown(uint32 /*msec*/)
 {
     //m_procCooldown = time(NULL) + msec;
 }

src/server/game/Spells/SpellEffects.cpp

@@ -5519,7 +5519,7 @@ void Spell::EffectSummonPlayer(SpellEffIndex /*effIndex*/)
     unitTarget->ToPlayer()->GetSession()->SendPacket(&data);
 }
 
-void Spell::EffectActivateObject(SpellEffIndex effIndex)
+void Spell::EffectActivateObject(SpellEffIndex /*effIndex*/)
 {
     if (!gameObjTarget)
         return;