[gtk] scale: Fix value widget measurement

[Timm Bäder <baedert src gnome org>]

commit 87aeec2b63bdc1cd10305df9efc16e1ee3096e21
Author: Timm Bäder <mail baedert org>
Date:   Fri Aug 9 14:26:57 2019 +0200

    scale: Fix value widget measurement
    
    Since we set the size request of the label, the later measure()
    call would return at least the size we set, making the size only ever
    grow.

 gtk/gtkscale.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkscale.c b/gtk/gtkscale.c
index 7f8aa1e071..9a51d1eafb 100644
--- a/gtk/gtkscale.c
+++ b/gtk/gtkscale.c
@@ -253,6 +253,7 @@ update_label_request (GtkScale *scale)
   highest_value = gtk_adjustment_get_upper (adjustment);
 
   old_text = g_strdup (gtk_label_get_label (GTK_LABEL (priv->value_widget)));
+  gtk_widget_set_size_request (priv->value_widget, -1, -1);
 
   text = gtk_scale_format_value (scale, lowest_value);
   gtk_label_set_label (GTK_LABEL (priv->value_widget), text);