gdk: return 0, not NULL from gdk_device_get_n_axes()

diff --git a/gdk/gdkdevice.c b/gdk/gdkdevice.c
index 8e6feec025b463c170b1da26bf040924fc19632d..f7269f3dbae9e9176488d8e7190a5f1e23628562 100644 (file)
--- a/gdk/gdkdevice.c
+++ b/gdk/gdkdevice.c
@@ -972,7 +972,7 @@ gint
 gdk_device_get_n_axes (GdkDevice *device)
 {
   g_return_val_if_fail (GDK_IS_DEVICE (device), 0);
-  g_return_val_if_fail (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD, NULL);
+  g_return_val_if_fail (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD, 0);
 
   return device->priv->axes->len;
 }