Core/Mmaps: Charge ignoring z position of target (#17516)

* Core/Mmaps: Charge ignoring z position of target

By cemak closes #15011

src/server/game/Movement/PathGenerator.cpp

@@ -940,3 +940,8 @@ void PathGenerator::ReducePathLenghtByDist(float dist)
         nextVec = currVec; // we're going backwards
     }
 }
+
+bool PathGenerator::IsInvalidDestinationZ(Unit const* target) const
+{
+    (target->GetPositionZ() - GetActualEndPosition().z) > 5.0f;
+}

src/server/game/Movement/PathGenerator.h

@@ -58,6 +58,7 @@ class PathGenerator
         // Calculate the path from owner to given destination
         // return: true if new path was calculated, false otherwise (no change needed)
         bool CalculatePath(float destX, float destY, float destZ, bool forceDest = false, bool straightLine = false);
+        bool IsInvalidDestinationZ(Unit const* target) const
 
         // option setters - use optional
         void SetUseStraightPath(bool useStraightPath) { _useStraightPath = useStraightPath; }

src/server/game/Spells/Spell.cpp

@@ -5267,7 +5267,11 @@ SpellCastResult Spell::CheckCast(bool strict)
                             return SPELL_FAILED_OUT_OF_RANGE;
                         else if (!result || m_preGeneratedPath.GetPathType() & (PATHFIND_NOPATH | PATHFIND_INCOMPLETE))
                             return SPELL_FAILED_NOPATH;
+                        else if (m_preGeneratedPath.IsInvalidDestinationZ(target)) // Check position z, if not in a straight line
+                            return SPELL_FAILED_NOPATH;
                     }
+                    else if (m_preGeneratedPath.IsInvalidDestinationZ(target)) // Check position z, if in a straight line
+                            return SPELL_FAILED_NOPATH;
 
                     m_preGeneratedPath.ReducePathLenghtByDist(objSize); // move back
                 }