shishi-0.0.30.pot file

[Bruno Haible]

Hello Simon,

The shishi-0.0.30.pot file that was sent to the translators does not have
line numbers referring to the source files.

Some PO file editors can show the translator the source code context, to
help her in the translations. (Example: Kbabel, or Emacs PO mode's 's'
command.)

Would you mind enabling this facility for translators? It only costs you
to remove the --no-location option from po/Makevars.

Bruno