Core: Remove "may be used uninitialized in this function", "unused parameter ‘xxx’" and "'xxx' defined but not used" warnings

--HG--
branch : trunk

src/server/game/Spells/SpellEffects.cpp

@@ -6200,7 +6200,7 @@ void Spell::EffectBlock(uint32 /*i*/)
         unitTarget->ToPlayer()->SetCanBlock(true);
 }
 
-void Spell::EffectLeap(uint32 i)
+void Spell::EffectLeap(uint32 /*i*/)
 {
     if (unitTarget->isInFlight())
         return;