Adjust offset and border calculations for X.

Adjust offset and border calculations for X.

* xfns.c (x_real_pos_and_offsets): Take outer_border as arg also.
Initialize all args.  Get outer_border from window attributes.
Fix typo for top_offset_y.
(x_real_positions): Adjust for new arg to x_real_pos_and_offsets.
(Fx_frame_geometry): Get outer_border also.  Use attrs.width/height.

* xmenu.c (x_menu_show): Adjust for new arg to x_real_pos_and_offsets.

* xterm.h (x_real_pos_and_offsets): Take outer_border as arg also.