Merge branch '4.3.4' of https://gitlab.com/trinitycore/TrinityCore_434 into 4.3.4

src/server/game/Spells/Spell.cpp

@@ -788,6 +788,14 @@ void Spell::SelectSpellTargets()
 
         if (m_spellInfo->IsChanneled())
         {
+            // maybe do this for all spells?
+            if (m_UniqueTargetInfo.empty() && m_UniqueGOTargetInfo.empty() && m_UniqueItemInfo.empty() && !m_targets.HasDst())
+            {
+                SendCastResult(SPELL_FAILED_BAD_IMPLICIT_TARGETS);
+                finish(false);
+                return;
+            }
+
             uint8 mask = (1 << i);
             for (std::list<TargetInfo>::iterator ihit = m_UniqueTargetInfo.begin(); ihit != m_UniqueTargetInfo.end(); ++ihit)
             {