[gtk+] Revert "LevelBar: Avoid unnecessarily copying allocation"

[Matthias Clasen <matthiasc src gnome org>]

commit a5ba6dfe9713b1017a84691b24e48eb4fefb7e75
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Aug 12 09:46:06 2017 -0400

    Revert "LevelBar: Avoid unnecessarily copying allocation"
    
    This reverts commit d5e25be9bcd6c1a9db74ee749fa8808ba55a5ca5.
    
    It doesn't build.

 gtk/gtklevelbar.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtklevelbar.c b/gtk/gtklevelbar.c
index ac42442..5092b09 100644
--- a/gtk/gtklevelbar.c
+++ b/gtk/gtklevelbar.c
@@ -434,8 +434,9 @@ gtk_level_bar_allocate_trough_continuous (GtkLevelBar *self,
   inverted = gtk_level_bar_get_real_inverted (self);
 
   /* allocate the empty (unfilled) part */
+  block_area = *allocation;
   gtk_widget_size_allocate (self->priv->block_widget[inverted ? 0 : 1],
-                            allocation
+                            &block_area,
                             baseline,
                             out_clip);