localprofile: Check the result of `open()`

Change-Id: If958f6aa7a89ca3878482b60be5c3905502cac3e
Reviewed-by: Nicolas Jäger <nicolas.jager@savoirfairelinux.com>

src/localprofilecollection.cpp

@@ -78,7 +78,12 @@ bool LocalProfileEditor::save(const Profile* pro)
 
     qDebug() << "Saving profile in:" << filename;
     QFile file {filename};
-    file.open(QIODevice::WriteOnly);
+
+    if (Q_UNLIKELY(!file.open(QIODevice::WriteOnly))) {
+        qWarning() << "Can't write to" << filename;
+        return false;
+    }
+
     file.write(result);
     file.close();
     return true;