From: Bruno Turcksin <bruno.turcksin@gmail.com>
Date: Tue, 17 Nov 2015 15:25:47 +0000 (-0600)
Subject: Improve operator --
X-Git-Tag: v8.4.0-rc2~221^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F1878%2Fhead;p=dealii.git

Improve operator --
---

diff --git a/include/deal.II/grid/tria_accessor.templates.h b/include/deal.II/grid/tria_accessor.templates.h
index 4e68cf6f98..031e86d770 100644
--- a/include/deal.II/grid/tria_accessor.templates.h
+++ b/include/deal.II/grid/tria_accessor.templates.h
@@ -2240,10 +2240,11 @@ inline
 void
 TriaAccessor<0, dim, spacedim>::operator -- ()
 {
-  if (global_vertex_index!=numbers::invalid_unsigned_int)
+  if (global_vertex_index != numbers::invalid_unsigned_int)
     {
-      --global_vertex_index;
-      if (global_vertex_index==static_cast<unsigned int>(-1))
+      if (global_vertex_index != 0)
+        --global_vertex_index;
+      else
         global_vertex_index = numbers::invalid_unsigned_int;
     }
 }