handle cancel in PreferencesDialog on_chooseFile_clicked

[Dirk Hohndel]

On Tue, 2014-02-11 at 19:49 +0100, Patrick Majewski wrote:
> Hi,
> I am Patrick Majewski, a German developer and diver. I like what you all
> did with Subsurface. Especially after the switch to Qt. This enables me
> to give some value back. Cause this is my first time I send a patch to
> an oss, please be kind if I'm doing it wrong ;)

Nothing wrong, this looks great!

> If I click in the Preferences Dialog on the 3 dots to choose a default
> File to load and cancel the opening File Dialog an empty string is
> returned and set to the corresponding QLineEdit.
> The new behavior (and mostly expected) is to update the QLineEdit only
> if there is a filename returned from QFileDialog.

Agreed. Good catch and thanks for your contribution!

/D