Some more fixes for pixelwise resizing.

Some more fixes for pixelwise resizing.

Remove scroll_bar_actual_width from frames.
* frame.h (struct frame): Remove scroll_bar_actual_width slot.
* frame.c (Fscroll_bar_width): Return scroll bar area width.
(x_figure_window_size):
* nsterm.m (x_set_window_size):
* widget.c (set_frame_size):
* w32term.c (x_set_window_size):
* xterm.c (x_set_window_size, x_set_window_size_1): Don't set
scroll_bar_actual_width.

Convert scroll_bar members to integers on Windows.
* w32term.h (struct scroll_bar): Convert top, left, width,
height, start, end and dragging to integers.
* w32fns.c (w32_createscrollbar): Remove XINT conversions for
scroll_bar members.
* w32term.c (w32_set_scroll_bar_thumb)
(w32_scroll_bar_handle_click): Remove XINT conversions for
scroll_bar members.  Treat bar->dragging as integer.
(x_scroll_bar_create): Call ALLOCATE_PSEUDOVECTOR with "top" as
first element.  Remove XINT conversions for scroll_bar members.
(w32_set_vertical_scroll_bar, x_scroll_bar_report_motion):
Remove XINT conversions for scroll_bar members.

Fix assignment for new window total sizes.
* window.c (Fwindow_resize_apply_total): Assign values for
minibuffer window.
* window.el (window--pixel-to-size): Remove function.
(window--pixel-to-total-1, window--pixel-to-total): Fix
calculation of new total sizes.