range: Fix typo in allocate_trough

lower - upper results in something negative of course.

diff --git a/gtk/gtkrange.c b/gtk/gtkrange.c
index 981409eb6dea8d6ac246cbd897583b4b0ebf04f3..ba37dbee349071fa6f29340b1a97cb2c09eba349 100644 (file)
--- a/gtk/gtkrange.c
+++ b/gtk/gtkrange.c
@@ -1405,7 +1405,7 @@ gtk_range_allocate_trough (GtkGizmo            *gizmo,
 
       level = CLAMP (priv->fill_level, lower, upper - page_size);
 
-      fill = (level - lower) / (lower - upper - page_size);
+      fill = (level - lower) / (upper - lower - page_size);
 
       if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
         {