Fixed multiple copies of materials being added, this script now works for...

Fixed multiple copies of materials being added, this script now works for metaballs, text, curves etc. Select by material only shows used materials in teh pop up now too.

space_view3d_materials_utils.py

@@ -694,7 +694,7 @@ def register():
     if km is None:
         km = kc.keymaps.new(name="3D View")
 
-    kmi = km.items.new('wm.call_menu', 'Q', 'PRESS')
+    kmi = km.keymap_items.new('wm.call_menu', 'Q', 'PRESS')
     kmi.properties.name = "VIEW3D_MT_master_material"
 
 def unregister():
@@ -709,4 +709,4 @@ def unregister():
                 break
 
 if __name__ == "__main__":
-    register()
\ No newline at end of file
+    register()