macterm.c (x_raise_frame): Add BLOCK_INPUT around SelectWindow

macterm.c (x_raise_frame): Add BLOCK_INPUT around SelectWindow
  (x_lower_frame): Add BLOCK_INPUT around SendBehind
  (make_mac_frame): Add BLOCK_INPUT around the making of a
  terminal frame
  (mac_initialize): Add BLOCK_INPUT around carbon initialization
macgui.h (mktime): Use emacs_mktime
macfns.c (Fx_file_dialog): Add BLOCK_INPUT around more code.
  Make a cancel file-open dialog be like C-g.
mac.c (mktime): Use emacs_mktime
  (Fdo_applescript): Add BLOCK_INPUT around do_applescript
  (Fmac_paste_function): Add better error handling for carbon
  cut/paste