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;
+}