Added sanity_check_date_parsing() and

2008-11-21  Murray Cumming  <murrayc@murrayc.com>

* glom/libglom/data_structure/glomconversions.[h|cc]:
Added sanity_check_date_parsing() and 
sanity_check_date_text_representation_uses_4_digit_years().
* glom/main.cc: Use them to show informative warnings at startup.
The translators comment for %x mentions those warnings now too.
* po/es.po: Add a translation for %x because the es locales do not 
use 4-digit years for this.
Ubuntu bug https://bugs.launchpad.net/ubuntu/+source/glom/+bug/300057

* glom/test_pyembed.cc: Add a cast to avoid a warning.
* glom/utility_widgets/db_adddel/db_adddel.cc: Initialize InnerIgnore 
members to avoid warnings, though these would always be initialized in 
real life.

svn path=/trunk/; revision=1725