Make sure we don't upload empty images

recording/recordingformats.cpp

@@ -31,7 +31,7 @@ RecordingFormats::RecordingFormats(formats::Recording f) {
         delete enc;
         if (interrupt) {
             tmpDir.removeRecursively();
-            return;
+            return QByteArray();
         }
         QFile res(path);
         if (!res.open(QFile::ReadOnly)) {

uploaders/uploadersingleton.cpp

@@ -73,6 +73,7 @@ void UploaderSingleton::upload(QPixmap *pixmap) {
 }
 
 void UploaderSingleton::upload(QByteArray img, QString format) {
+    if (img.isEmpty()) return;
     QFile file(saveDir.absoluteFilePath(formatter::format(settings::settings().value("fileFormat").toString(), format.toLower())));
     if (file.open(QFile::WriteOnly)) {
         file.write(img);