broken build

[Ben Pfaff]

Hi John, the recent commit

    commit 691a034d7f2139076fa012739dffd40ef5db4a9b
    Author: John Darrington <address@hidden>
    Date:   Wed Jul 5 21:02:56 2017 +0200

        Add copyright and licence notices to files which lack them.

        The savannah hackers have been recently complaining about lack of 
copyright/licence notices.

broke the build with messages like this:

    xgettext: src/ui/gui/aggregate.ui:17:1: XML or text declaration not at 
start of entity

Can you fix it?

Also, I doubt that editing with Glade is going to preserve notices in
.ui files.