Moved the vertex optimize dictionary initialization out of the object…

… loop to ensure we de-dupe across objects not just within them.

For the C90B_cockpit2 this return the vert count back to that of the original on a round trip 30000->11000

io_xplane2blender/xplane_types/xplane_mesh.py

@@ -51,6 +51,7 @@ def getSortKey(xplaneObject):
         xplaneObjects = sorted(xplaneObjects, key=getSortKey)
 
         dg = bpy.context.evaluated_depsgraph_get()
+        vertices_dct = {}
         for xplaneObject in xplaneObjects:
             if (
                 xplaneObject.type == "MESH"
@@ -115,7 +116,6 @@ def getSortKey(xplaneObject):
                     )
                     tmp_faces.append(tmp_face)
 
-                vertices_dct = {}
                 for tmp_face in tmp_faces:
                     # To reverse the winding order for X-Plane from CCW to CW,
                     # we iterate backwards through the mesh data structures