Core/Spells: Don't fail spells SPELL_ATTR2_FAIL_ON_ALL_TARGETS_IMMUNE when target list is empty for one effect

Closes TrinityCore#30603

Author: Shauren

src/server/game/Spells/Spell.cpp

@@ -748,7 +748,7 @@ void Spell::SelectSpellTargets()
         {
             if (m_spellInfo->HasAttribute(SPELL_ATTR1_REQUIRE_ALL_TARGETS))
             {
-                bool noTargetFound = std::none_of(m_UniqueTargetInfo.begin(), m_UniqueTargetInfo.end(), [effectMask = 1u << spellEffectInfo.EffectIndex](TargetInfo const& target)
+                bool noTargetFound = std::ranges::none_of(m_UniqueTargetInfo, [effectMask = 1u << spellEffectInfo.EffectIndex](TargetInfo const& target)
                 {
                     return target.EffectMask & effectMask;
                 });
@@ -760,20 +760,6 @@ void Spell::SelectSpellTargets()
                     return;
                 }
             }
-            if (m_spellInfo->HasAttribute(SPELL_ATTR2_FAIL_ON_ALL_TARGETS_IMMUNE))
-            {
-                bool anyNonImmuneTargetFound = std::any_of(m_UniqueTargetInfo.begin(), m_UniqueTargetInfo.end(), [effectMask = 1u << spellEffectInfo.EffectIndex](TargetInfo const& target)
-                {
-                    return target.EffectMask & effectMask && target.MissCondition != SPELL_MISS_IMMUNE && target.MissCondition != SPELL_MISS_IMMUNE2;
-                });
-
-                if (!anyNonImmuneTargetFound)
-                {
-                    SendCastResult(SPELL_FAILED_IMMUNE);
-                    finish(SPELL_FAILED_IMMUNE);
-                    return;
-                }
-            }
         }
 
         if (m_spellInfo->IsChanneled())
@@ -798,6 +784,21 @@ void Spell::SelectSpellTargets()
         }
     }
 
+    if (m_spellInfo->HasAttribute(SPELL_ATTR2_FAIL_ON_ALL_TARGETS_IMMUNE))
+    {
+        bool anyNonImmuneTargetFound = std::ranges::any_of(m_UniqueTargetInfo, [](TargetInfo const& target)
+        {
+            return target.MissCondition != SPELL_MISS_IMMUNE && target.MissCondition != SPELL_MISS_IMMUNE2;
+        });
+
+        if (!anyNonImmuneTargetFound)
+        {
+            SendCastResult(SPELL_FAILED_IMMUNE);
+            finish(SPELL_FAILED_IMMUNE);
+            return;
+        }
+    }
+
     if (m_targets.HasDst())
     {
         if (m_spellInfo->HasAttribute(SPELL_ATTR8_REQUIRES_LOCATION_TO_BE_ON_LIQUID_SURFACE))