atspi: suppress runtime error, build warning

atspi: suppress runtime error, build warning

[runtime error]
(1) elm_atspi_bridge.c:2787 _bridge_path_from_object() safety check failed: eo == NULL
(2) elm_atspi_bridge.c:6184 _bridge_object_register() Unable to register class w/o Elm_Interface_Atspi_Accessible!
(3) lib/eo/eo.c:697 _eo_call_resolve() in elm_widget.eo.c:169: func 'elm_obj_widget_access_highlight_in_theme_get' (288) could not be resolved for class 'Edje_Object'

- Note: The access_highlight_in_theme (3) should handle non Elm_LAYOUT_CLASS.
  Or the access_highlight_in_theme should be removed. If the screen-reader
  shows highlight, then the access_highlight_in_theme doesn't make sense.

[build warning]
(1) warning: passing argument 2 of '_object_get_bus_name_and_path' discards 'const' qualifier from pointer target type
(2) warning: passing argument 3 of '_object_get_bus_name_and_path' from incompatible pointer type

Change-Id: I4a690afdbf90f2bf72b497d0c3916c7fc83ddb74