use it in project_new().
Group 'generic' functions related to GTK+ together at the top of
ui_utils.h.
Make sure G_GNUC_NULL_TERMINATED is defined in geany.h.


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@1702 ea778897-0a13-0410-b9d1-a72fbfd435f5