[gnumeric] GUI: Fix split pane problem.

[Morten Welinder <mortenw src gnome org>]

commit fb59ffb7006727e454dae4b59d993d06a8295f7f
Author: Morten Welinder <terra gnome org>
Date:   Fri Feb 28 14:18:44 2014 -0500

    GUI: Fix split pane problem.

 ChangeLog               |    2 ++
 NEWS                    |    1 +
 src/sheet-control-gui.c |    3 +++
 3 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 28a479a..faf79ce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,8 @@
 
        * src/sheet-control-gui.c (resize_pane_pos, set_resize_pane_pos):
        If row/column canvas is not visible, ignore them.
+       (scg_gtk_paned_set_position): Don't allow negative position.
+       Fixes #725375.
 
        * src/ssdiff.c (diff_sheets_attrs): Detect more sheet attribute
        changes.
diff --git a/NEWS b/NEWS
index baa352e..ab7b706 100644
--- a/NEWS
+++ b/NEWS
@@ -45,6 +45,7 @@ Morten:
        * Fix xls/biff8 import of comment's text attributes.  [#725168]
        * Improve the xls macro-roundtrip situation.  [#725220]
        * Improve ssdiff for sheet attributes.
+       * Fix split pane problem.  [#725375]
 
 --------------------------------------------------------------------------
 Gnumeric 1.12.11
diff --git a/src/sheet-control-gui.c b/src/sheet-control-gui.c
index 1e984ab..d64102a 100644
--- a/src/sheet-control-gui.c
+++ b/src/sheet-control-gui.c
@@ -1306,6 +1306,9 @@ resize_pane_pos (SheetControlGUI *scg, GtkPaned *p,
 static void
 scg_gtk_paned_set_position (SheetControlGUI *scg, GtkPaned *p, int pane_pos)
 {
+       /* A negative position is special to GtkPaned.  */
+       pane_pos = MAX (pane_pos, 0);
+
        if (p == scg->vpane)
                scg->vpos = pane_pos;
        else