Fix crash on profile change.

Related to #440

src/bin/projectitemmodel.cpp

@@ -650,8 +650,13 @@ bool ProjectItemModel::requestAddBinClip(QString &id, const QDomElement &descrip
     if (res) {
         int loadJob = pCore->jobManager()->startJob<LoadJob>({id}, -1, QString(), description, std::bind(readyCallBack, id));
         int thumbJob = pCore->jobManager()->startJob<ThumbJob>({id}, loadJob, QString(), 150, 0, true);
-        pCore->jobManager()->startJob<AudioThumbJob>({id}, loadJob, QString());
-        pCore->jobManager()->startJob<CacheJob>({id}, thumbJob, QString(), 150);
+        ClipType::ProducerType type = new_clip->clipType();
+        if (type == ClipType::AV || type == ClipType::Audio || type == ClipType::Playlist) {
+            pCore->jobManager()->startJob<AudioThumbJob>({id}, loadJob, QString());
+        }
+        if (type == ClipType::AV || type == ClipType::Video || type == ClipType::Playlist) {
+            pCore->jobManager()->startJob<CacheJob>({id}, thumbJob, QString(), 150);
+        }
     }
     return res;
 }

src/jobs/cachejob.cpp

@@ -64,6 +64,10 @@ const QString CacheJob::getDescription() const
 bool CacheJob::startJob()
 {
     // We reload here, because things may have changed since creation of this job
+    if (m_done) {
+        // Job aborted
+        return false;
+    }
     m_binClip = pCore->projectItemModel()->getClipByBinID(m_clipId);
     if (m_binClip->clipType() != ClipType::Video && m_binClip->clipType() != ClipType::AV && m_binClip->clipType() != ClipType::Playlist) {
         // Don't create thumbnail for audio clips