QTranslator::load returns false for empty translation-files

Change https://codereview.qt-project.org/21710 introduced a behavioral change in QTranslator.
If you have a valid .qm-file with no translations QTranslator::load now returns false. Before it would return true.
It now checks if the filesize is <= the size of the magic header.

It is probably a good thing to not load it, because you have to check less QTranslator objects for a matching context, but it would be nice to be able to see if a translation couldn't be found.

Perhaps an extra check if the filesize is equal to the size of the magic buffer, which then returns true?
Although it could be a bit strange to have a load() function return true when it hasn't loaded anything.

edit:
Some of the .qm-file are 16 bytes and some are 23 bytes in size.
The files with 23 bytes don't get loaded either.
They contain the following additional data: 88 - 00 00 00 02 - 01 01
which is of type "NumerusRules"