[gtk+] gdk: Allow calling gdk_cairo_surface_create_from_pixbuf with scale 0

[Kalev Lember <klember src gnome org>]

commit 112e74ed6412290f38cc1cbeede65e8e99607c75
Author: Kalev Lember <kalevlember gmail com>
Date:   Mon Oct 6 14:19:21 2014 +0200

    gdk: Allow calling gdk_cairo_surface_create_from_pixbuf with scale 0
    
    The documentation explicitly states that 0 is an allowed value for using
    the same scale as the window. This 0 value is also explicitly checked
    down in the call chain and handled.

 gdk/gdkcairo.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkcairo.c b/gdk/gdkcairo.c
index c541215..a363394 100644
--- a/gdk/gdkcairo.c
+++ b/gdk/gdkcairo.c
@@ -285,7 +285,7 @@ gdk_cairo_surface_create_from_pixbuf (const GdkPixbuf *pixbuf,
   cairo_surface_t *surface;
 
   g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
-  g_return_val_if_fail (scale > 0, NULL);
+  g_return_val_if_fail (scale >= 0, NULL);
   g_return_val_if_fail (for_window == NULL || GDK_IS_WINDOW (for_window), NULL);
 
   if (gdk_pixbuf_get_n_channels (pixbuf) == 3)