BUG: DICOMWidgets: Skip promptForExtension dialog if extension suppor…

…t disabled

This commit fixes a runtime error about missing 'extensionsManagerModel'
attribute reported when Slicer is built without extension support.

Indeed, qSlicerCoreApplication::extentionsManagerModel does not exist
because it's surrounded by #ifdef Slicer_BUILD_EXTENSIONMANAGER_SUPPORT.

svn-url: http://viewvc.slicer.org/viewvc.cgi/Slicer4?view=revision&revision=28033
git-svn-id: http://svn.slicer.org/Slicer4/trunk@28033 3bd1e089-480b-0410-8dfb-8563597acbee

Modules/Scripted/DICOMLib/DICOMWidgets.py

@@ -412,6 +412,9 @@ def onDirectoryImported(self):
     """The dicom browser will emit multiple directoryImported
     signals during the same operation, so we collapse them
     into a single check for compatible extensions."""
+    if not hasattr(slicer.app, 'extensionsManagerModel'):
+      # Slicer may not be built with extension manager support
+      return
     if not self.extensionCheckPending:
       self.extensionCheckPending = True
       def timerCallback():