Replace `last-command-event' by `last-command-char' in XEmacs.

Replace `last-command-event' by `last-command-char' in XEmacs.
progmodes/cc-defs.el (c-last-command-char): New macro.
progmodes/cc-align.el (c-semi&comma-inside-parenlist)
(c-semi&comma-no-newlines-before-nonblanks)
(c-semi&comma-no-newlines-for-oneline-inliners): Use the new macro in
place of `last-command-event'.
progmodes/cc-cmds.el (c-electric-pound, c-electric-brace)
(c-electric-slash, c-electric-semi&comma, c-electric-lt-gt)
(c-electric-paren, c-electric-continued-statement): Use the new macro in
place of `last-command-event'.