[gtk+] Use gtk_internal_return_val_if_fail here

[Matthias Clasen <matthiasc src gnome org>]

commit ecd0ce3993c3b821df9fe11e136d787a6be3e3e2
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jan 10 19:47:58 2017 -0500

    Use gtk_internal_return_val_if_fail here
    
    It seems odd to have checks in just a few functions,
    so switch everything over to use the internal versions.

 gtk/gtkcssgadget.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkcssgadget.c b/gtk/gtkcssgadget.c
index 4d49185..f1416a3 100644
--- a/gtk/gtkcssgadget.c
+++ b/gtk/gtkcssgadget.c
@@ -976,7 +976,7 @@ gtk_css_gadget_get_margin_allocation (GtkCssGadget  *gadget,
 {
   GtkCssGadgetPrivate *priv = gtk_css_gadget_get_instance_private (gadget);
 
-  g_return_if_fail (GTK_IS_CSS_GADGET (gadget));
+  gtk_internal_return_if_fail (GTK_IS_CSS_GADGET (gadget));
 
   if (!gtk_css_gadget_get_visible (gadget))
     {
@@ -1001,7 +1001,7 @@ gtk_css_gadget_get_border_allocation (GtkCssGadget  *gadget,
   GtkCssGadgetPrivate *priv = gtk_css_gadget_get_instance_private (gadget);
   GtkBorder margin;
 
-  g_return_if_fail (GTK_IS_CSS_GADGET (gadget));
+  gtk_internal_return_if_fail (GTK_IS_CSS_GADGET (gadget));
 
   if (!gtk_css_gadget_get_visible (gadget))
     {
@@ -1039,7 +1039,7 @@ gtk_css_gadget_get_content_allocation (GtkCssGadget  *gadget,
   GtkBorder margin, border, padding, extents;
   GtkCssStyle *style;
 
-  g_return_if_fail (GTK_IS_CSS_GADGET (gadget));
+  gtk_internal_return_if_fail (GTK_IS_CSS_GADGET (gadget));
 
   if (!gtk_css_gadget_get_visible (gadget))
     {