Core/Spells: Explicitly set target-effects to hot ONLY owner/caster and his/her pet for Hunter T10 Set bonuses and the Warlock T10 4P bonuses

Thanks to tenma for the mini-discussion on the subject.

--HG--
branch : trunk

src/server/game/Spells/SpellMgr.cpp

@@ -3891,6 +3891,7 @@ void SpellMgr::LoadSpellCustomAttr()
             break;
         case 70728: // Exploit Weakness
         case 70840: // Devious Minds
+            spellInfo->EffectImplicitTargetA[0] = TARGET_UNIT_CASTER;
             spellInfo->EffectImplicitTargetB[0] = TARGET_UNIT_PET;
             count++;
             break;