[glom] Fix compiler warning

[Murray Cumming <murrayc src gnome org>]

commit 15053c71ce5151f0c180f8f1787d3cd1ce943d8e
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Aug 11 16:20:33 2011 +0200

    Fix compiler warning

 glom/utility_widgets/gimpruler/gimpruler.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/glom/utility_widgets/gimpruler/gimpruler.c b/glom/utility_widgets/gimpruler/gimpruler.c
index 193633d..02bf872 100644
--- a/glom/utility_widgets/gimpruler/gimpruler.c
+++ b/glom/utility_widgets/gimpruler/gimpruler.c
@@ -1030,7 +1030,7 @@ gimp_ruler_draw_ticks (GimpRuler *ruler)
   g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
   text_size = strlen (unit_str) * digit_height + 1;
 
-  for (scale = 0; scale < G_N_ELEMENTS (ruler_metric.ruler_scale); scale++)
+  for (scale = 0; scale < (gint)G_N_ELEMENTS (ruler_metric.ruler_scale); scale++)
     if (ruler_metric.ruler_scale[scale] * fabs (increment) > 2 * text_size)
       break;