[#86 state:fixed] Fixed a crash in GetOutlineViewValues.

core/app_cocoa.py

@@ -257,7 +257,7 @@ class DupeGuru(app.DupeGuru):
         if tag in (0,2): #Normal results / Power Marker
             if tag == 0:
                 g, d = self.GetObjects(node_path)
-                if d is None:
+                if (d is None) and (g is not None):
                     d = g.ref
             else:
                 d = self.results.dupes[node_path[0]]

core/tests/app_cocoa_test.py

@@ -303,7 +303,10 @@ class TCDupeGuru(TestCase):
         # Out of range requests don't crash and return an empty value
         app = self.app
         # [0, 2] is out of range
+        # Directories
         eq_(app.GetOutlineViewValues(1, [0, 2]), []) # no crash
+        # Normal results
+        app.GetOutlineViewValues(0, [42, 0]) # no crash
     
 
 class TCDupeGuru_renameSelected(TestCase):