Core/Entities: Added possibility to construct a Position using a G3D::Vector3

(cherry picked from commit 17917171f3)

src/server/game/Entities/Object/Position.cpp

@@ -21,6 +21,11 @@
 
 #include <G3D/g3dmath.h>
 
+Position::Position(G3D::Vector3 const& vect)
+{
+    Relocate(vect.x, vect.y, vect.z, 0.f);
+}
+
 bool Position::operator==(Position const &a)
 {
     return (G3D::fuzzyEq(a.m_positionX, m_positionX) &&

src/server/game/Entities/Object/Position.h

@@ -31,6 +31,8 @@ struct TC_GAME_API Position
 
     Position(Position const& loc) { Relocate(loc); }
 
+    Position(G3D::Vector3 const& vect);
+
     struct PositionXYStreamer
     {
         explicit PositionXYStreamer(Position& pos) : Pos(&pos) { }