[gitg] history: use is_head from GgitBranch

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 126dc37a446dcf220c5d95cc0266d7989fa73b04
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Sat Mar 30 21:23:52 2013 +0100

    history: use is_head from GgitBranch

 plugins/history/gitg-history-navigation.vala |   27 +++++++++++--------------
 1 files changed, 12 insertions(+), 15 deletions(-)
---
diff --git a/plugins/history/gitg-history-navigation.vala b/plugins/history/gitg-history-navigation.vala
index f4bf191..4aadbfa 100644
--- a/plugins/history/gitg-history-navigation.vala
+++ b/plugins/history/gitg-history-navigation.vala
@@ -103,13 +103,6 @@ namespace GitgHistory
 
                        d_all.reverse();
 
-                       Gitg.Ref? head = null;
-
-                       try
-                       {
-                               head = repo.get_head();
-                       } catch {}
-
                        if (CommandLine.all)
                        {
                                model.append_default(_("All commits"), null, (nc) => ref_activated(null));
@@ -124,31 +117,35 @@ namespace GitgHistory
 
                        foreach (var item in branches)
                        {
-                               var it = item;
+                               var branch = item as Ggit.Branch;
                                string? icon = null;
                                bool isdef = false;
 
-                               if (head != null && item.get_target().equal(head.get_target()))
+                               try
                                {
-                                       icon = "object-select-symbolic";
-
-                                       if (!CommandLine.all)
+                                       if (branch.is_head())
                                        {
-                                               isdef = true;
+                                               icon = "object-select-symbolic";
+
+                                               if (!CommandLine.all)
+                                               {
+                                                       isdef = true;
+                                               }
                                        }
                                }
+                               catch {}
 
                                if (isdef)
                                {
                                        model.append_default(item.parsed_name.shortname,
                                                             icon,
-                                                            (nc) => ref_activated(it));
+                                                            (nc) => ref_activated(item));
                                }
                                else
                                {
                                        model.append(item.parsed_name.shortname,
                                                     icon,
-                                                    (nc) => ref_activated(it));
+                                                    (nc) => ref_activated(item));
                                }
                        }