[goffice] Tentative fix for #749444

[Jean Bréfort <jbrefort src gnome org>]

commit 102427c5df360f4b287b2980c64c745f0ec735f8
Author: Jean Brefort <jean brefort normalesup org>
Date:   Sat May 16 08:45:30 2015 +0200

    Tentative fix for #749444

 goffice/graph/gog-axis-line.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/goffice/graph/gog-axis-line.c b/goffice/graph/gog-axis-line.c
index 74f2716..c1dbb81 100644
--- a/goffice/graph/gog-axis-line.c
+++ b/goffice/graph/gog-axis-line.c
@@ -2700,7 +2700,7 @@ gog_axis_line_dataset_get_elem (GogDataset const *set, int dim_i)
 
        return (dim_i == GOG_AXIS_ELEM_CROSS_POINT)?
                &line->base.cross_location:
-               line->custom_ticks + dim_i - 1 - GOG_AXIS_ELEM_CROSS_POINT;
+               line->custom_ticks + (dim_i - 1 - GOG_AXIS_ELEM_CROSS_POINT);
 }
 
 static void