go-mode: Works for both GNU-Emacs and XEmacs-21.5
go-mode: Works for both GNU-Emacs and XEmacs-21.5

Fixes some portability issues between the Emacsen.

R=golang-dev, sameer, bradfitz, ryanb
CC=golang-dev
http://codereview.appspot.com/6206043

Committer: Sameer Ajmani <da4a4efb907a17fabb3e092841511e7f24e226cf@golang.org>

tv42/old-go,tv42/old-go,apparentlymart/golang,tv42/old-go,gnanderson/go,dsriram/golang,dsriram/golang,tv42/old-go,gnanderson/go,dsriram/golang,gnanderson/go,dsriram/golang,tv42/old-go,pombredanne/go-deleteme,apparentlymart/golang,gnanderson/go,tv42/old-go,apparentlymart/golang,gnanderson/go,pombredanne/go-deleteme,pombredanne/go-deleteme,gnanderson/go,apparentlymart/golang,dsriram/golang,apparentlymart/golang,dsriram/golang,pombredanne/go-deleteme,apparentlymart/golang,dsriram/golang,pombredanne/go-deleteme,tv42/old-go,pombredanne/go-deleteme,pombredanne/go-deleteme,gnanderson/go,apparentlymart/golang