[gitg] diff-view-file: fix the mark position

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 0e4057e95f982b0092555fda62b426322f2ac007
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Sat Dec 19 13:15:14 2015 +0100

    diff-view-file: fix the mark position

 libgitg/gitg-diff-view-file.vala |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/libgitg/gitg-diff-view-file.vala b/libgitg/gitg-diff-view-file.vala
index 5476bf5..025df56 100644
--- a/libgitg/gitg-diff-view-file.vala
+++ b/libgitg/gitg-diff-view-file.vala
@@ -508,7 +508,6 @@ class Gitg.DiffViewFile : Gtk.Grid
                }
 
                iter.set_line_offset(0);
-               int line_header = iter.get_line();
                buffer.create_source_mark(null, "header", iter);
 
                var header = @"@@ -$(hunk.get_old_start()),$(hunk.get_old_lines()) 
+$(hunk.get_new_start()),$(hunk.get_new_lines()) @@ $h\n";
@@ -570,7 +569,7 @@ class Gitg.DiffViewFile : Gtk.Grid
 
                        if (category != null)
                        {
-                               buffer.get_iter_at_line(out iter, line_header + i);
+                               buffer.get_iter_at_line(out iter, line_hunk_start + i);
                                buffer.create_source_mark(null, category, iter);
                        }
                }