merge.c:
Fixed crash when trying to print when a "key" radio has been selected
but no key has been selected yet.
object-editor-*-page.c:
Fixed potential inconsistencies with "key" radio buttons when a merge
source has not been selected but the field indicates that it is using a
merge key. This can happen when opening a glabels file that has a merge
type not supported by the current instance of glabels.
xml-label.c:
Also when parsing a merge field that has a merge type not supported,
don't continue parsing it.
projects / glabels / commit