[gedit-latex] Fixed old bug (2008-11-07) in tools dialog (related to Debian #561683)

[Pietro Battiston <pbattiston src gnome org>]

commit c41f600944a3fa4d10d71928c54880979c869ed4
Author: Pietro Battiston <pbattiston src gnome org>
Date:   Thu May 7 12:12:21 2015 +0200

    Fixed old bug (2008-11-07) in tools dialog (related to Debian #561683)

 latex/preferences/dialog.py |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/latex/preferences/dialog.py b/latex/preferences/dialog.py
index 61103e4..c44eb4c 100644
--- a/latex/preferences/dialog.py
+++ b/latex/preferences/dialog.py
@@ -217,7 +217,9 @@ class ConfigureToolDialog(GladeInterface):
 
     def _on_move_up_job_clicked(self, button):
         store, iter = self._view_job.get_selection().get_selected()
-        store.swap(iter)
+        prev = store.iter_previous(iter)
+        if prev:
+            store.swap(iter, prev)
 
     def _on_add_extension_clicked(self, button):
         extension = self._entry_new_extension.get_text()