Don't draw xwidgets that have just been resized

Don't draw xwidgets that have just been resized

This serves to eliminate the huge black bar displayed when the
offscreen widget has been resized (and as such the damage event
signal is sent), but the X window hasn't.

* src/xwidget.c (xv_do_draw): Don't draw xwidgets that have
just been resized.
(x_draw_xwidget_glyph_string)
(xwidget_init_view): Clear just_resized.

(Fxwidget_resize): Set just_resized first, then queue allocate.