bug#12199: c-guess doesn't guess indent-tabs-mode

[Johan Walles <johan.walles@gmail.com>]

Package: emacs
Version: 24.1.1

Hi Emacsers!

c-guess seems not to guess the correct value for indent-tabs-mode.

Try this:
1. Set indent-tabs-mode to nil.
2. Load a C file indented with tabs.
3. c-guess
4. Do describe-variable on indent-tabs-mode

Current result:
"Its value is nil"

Expected result:
"Its value is t" (since c-guess should have noticed that tabs are used
for indentation)

Note:
In my case this makes c-guess much less useful than it could have
been, since I work on both tab and space indented files.

  Regards //Johan