levelbar: fix a crash

We should not try to access a block with an index that exceeds the
number of blocks in the widget.

diff --git a/gtk/gtklevelbar.c b/gtk/gtklevelbar.c
index 45d9d4a0c68be69c554e6c344d1e112fd5e4feb3..7259f85de5be5a67c8eda556cfc281bd45056919 100644 (file)
--- a/gtk/gtklevelbar.c
+++ b/gtk/gtklevelbar.c
@@ -712,6 +712,8 @@ update_level_style_classes (GtkLevelBar *self)
           num_blocks = (gint) round (priv->max_value) - (gint) round (priv->min_value);
         }
 
+      num_filled = MIN (num_blocks, num_filled);
+
       classes[0] = "filled";
       classes[1] = value_class;
       for (i = 0; i < num_filled; i++)