bug#3928: changes to compilation-mode

[Glenn Morris]

Hi. This change:

2009-07-10  Sam Steingold  <sds at gnu.org>

   * progmodes/compile.el (compilation-mode-font-lock-keywords): Omake
   sometimes indents the errors it prints, so allow all regexps to
   start with spaces.

seems to cause issues with several of the existing compilation error
regexps.

See

http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=3928

Please could you comment on / fix this?

I think it would be better not to have to change a bunch of the
existing regexps.