The xmlnode API didn't check for the empty string ("") as
node name, which leads to...broken XML. I added those
checks to xmlnode, and fixed this occurrence in usermood.
Fixes #14342
[Desktop Entry]
_Name=Pidgin Internet Messenger
_GenericName=Internet Messenger
_Comment=Chat over IM. Supports AIM, Google Talk, Jabber/XMPP, MSN, Yahoo and more