Do not return false for loading an empty .qm file - that is, a valid
file without any translations. We're already shipping empty .qm
files for English translations of Qt since a while, mainly as a
stop for the QTranslator::load(const QLocale &, ...) logic.
Note that QCoreApplication::installTranslator() will still return
false for an empty translation file - which is ok, because it
arguably does not make much sense to install it.
[ChangeLog][QtCore][QTranslator] It is now possible to load qm files
without any translations. This is particularly useful for the
language the untranslated strings are written in; logic to
load translations can now handle the source language like all
other languages.
Task-number: QTBUG-31031
Change-Id: Ibcb84aa755538cb2fa21b14f8635295a58440bbb
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
9146432dc6