[USE_TOOLKIT_SCROLL_BARS] (get_control_part_bounds):

[USE_TOOLKIT_SCROLL_BARS] (get_control_part_bounds):
Rename from get_control_part_bound.  All callers changed.
(x_scroll_bar_clear): New function.
(x_clear_frame): Use it.
(XTset_vertical_scroll_bar): Don't call Draw1Control.
(x_scroll_bar_handle_click): Change type of second argument from
int to ControlPartCode.
(check_alarm): Remove declaration.
(XTread_Socket) [!TARGET_API_MAC_CARBON]: Don't call it.
(XTread_Socket): Use ControlPartCode instead of SInt16.