Removes dupliacte test in Grob::internal_vertical_less.

Tests for Y_AXIS parent in Grob::get_vertical_axis_group before
calling Align_interface::has_interface.

diff --git a/lily/grob.cc b/lily/grob.cc
index f385ed89f5d0f519e3db4485167a1823a72ceae9..57d06515eed6032d1a08cd3c6d3445167ac8e008 100644 (file)
--- a/lily/grob.cc
+++ b/lily/grob.cc
@@ -620,6 +620,8 @@ Grob::get_vertical_axis_group (Grob *g)
 {
   if (!g)
     return 0;
+  if (!g->get_parent (Y_AXIS))
+    return 0;
   if (Axis_group_interface::has_interface (g)
       && Align_interface::has_interface (g->get_parent (Y_AXIS)))
     return g;