comparison data/model/AlignmentModel.cpp @ 1712:54a954ee7529 single-point

Make it permissible to setPathFrom(nullptr)

     if (m_rawPath) m_rawPath->aboutToDelete();
     delete m_rawPath;
 
     m_rawPath = rawpath;
 
+    if (!m_rawPath) {
+        return;
+    }
+
     connect(m_rawPath, SIGNAL(modelChanged()),
             this, SLOT(pathChanged()));
 
     connect(m_rawPath, SIGNAL(modelChangedWithin(sv_frame_t, sv_frame_t)),
             this, SLOT(pathChangedWithin(sv_frame_t, sv_frame_t)));