prevent testsuite crash

diff --git a/zypp/source/SourceImpl.cc b/zypp/source/SourceImpl.cc
index d4da486..f0c7c53 100644 (file)
--- a/zypp/source/SourceImpl.cc
+++ b/zypp/source/SourceImpl.cc
@@ -302,7 +302,8 @@ namespace zypp
 
     void SourceImpl::release()
     {
-      _media_set->release();
+      if (_media_set)
+       _media_set->release();
     }
 
     media::MediaVerifierRef SourceImpl::verifier(unsigned media_nr)