Fix freeze when opening document

[kdenlive] / src / docclipbase.cpp

diff --git a/src/docclipbase.cpp b/src/docclipbase.cpp
index 9df4daec77ecb5b992d1cef5d87d72e58733ce9b..cb947a9b9caf1a4d7720db73901b67fafe13da5c 100644 (file)
--- a/src/docclipbase.cpp
+++ b/src/docclipbase.cpp
@@ -599,7 +599,10 @@ Mlt::Producer *DocClipBase::producer(int track)
 {
     m_producerMutex.lock();
     if (track == -1 || (m_clipType != AUDIO && m_clipType != AV && m_clipType != PLAYLIST)) {
-        if (m_baseTrackProducers.count() == 0) return NULL;
+        if (m_baseTrackProducers.count() == 0) {
+            m_producerMutex.unlock();
+            return NULL;
+        }
         for (int i = 0; i < m_baseTrackProducers.count(); i++) {
             if (m_baseTrackProducers.at(i) != NULL) {
                 m_producerMutex.unlock();