[gtk+/gtk-3-2] radiotoolbutton: Fix the introspection annotations

[Matthias Clasen <matthiasc src gnome org>]

commit 988f374151c1a99d388279465d970d438c9bda3e
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Thu Oct 27 19:03:11 2011 +0100

    radiotoolbutton: Fix the introspection annotations
    
    Everything that deals with a group has to be fixed.
    
    Plus, we have NULL checks without allowing NULL arguments; since NULL
    arguments are perfectly fine, we can relax the argument checks.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=662870

 gtk/gtkradiotoolbutton.c |   20 +++++++++++---------
 1 files changed, 11 insertions(+), 9 deletions(-)
---
diff --git a/gtk/gtkradiotoolbutton.c b/gtk/gtkradiotoolbutton.c
index c1db17f..75fbcd2 100644
--- a/gtk/gtkradiotoolbutton.c
+++ b/gtk/gtkradiotoolbutton.c
@@ -129,7 +129,8 @@ gtk_radio_tool_button_set_property (GObject         *object,
 
 /**
  * gtk_radio_tool_button_new:
- * @group: (allow-none): An existing radio button group, or %NULL if you are creating a new group
+ * @group: (allow-none) (transfer none) (element-type GtkRadioButton): An
+ *   existing radio button group, or %NULL if you are creating a new group
  * 
  * Creates a new #GtkRadioToolButton, adding it to @group.
  * 
@@ -152,7 +153,8 @@ gtk_radio_tool_button_new (GSList *group)
 
 /**
  * gtk_radio_tool_button_new_from_stock:
- * @group: (allow-none): an existing radio button group, or %NULL if you are creating a new group
+ * @group: (allow-none): an existing radio button group, or %NULL if you are
+ *   creating a new group
  * @stock_id: the name of a stock item
  * 
  * Creates a new #GtkRadioToolButton, adding it to @group. 
@@ -183,7 +185,7 @@ gtk_radio_tool_button_new_from_stock (GSList      *group,
 
 /**
  * gtk_radio_tool_button_new_from_widget:
- * @group: An existing #GtkRadioToolButton
+ * @group: (allow-none): An existing #GtkRadioToolButton, or %NULL
  *
  * Creates a new #GtkRadioToolButton adding it to the same group as @gruup
  *
@@ -196,9 +198,9 @@ gtk_radio_tool_button_new_from_widget (GtkRadioToolButton *group)
 {
   GSList *list = NULL;
   
-  g_return_val_if_fail (GTK_IS_RADIO_TOOL_BUTTON (group), NULL);
+  g_return_val_if_fail (group == NULL || GTK_IS_RADIO_TOOL_BUTTON (group), NULL);
 
-  if (group)
+  if (group != NULL)
     list = gtk_radio_tool_button_get_group (GTK_RADIO_TOOL_BUTTON (group));
   
   return gtk_radio_tool_button_new (list);
@@ -206,7 +208,7 @@ gtk_radio_tool_button_new_from_widget (GtkRadioToolButton *group)
 
 /**
  * gtk_radio_tool_button_new_with_stock_from_widget:
- * @group: An existing #GtkRadioToolButton.
+ * @group: (allow-none): An existing #GtkRadioToolButton.
  * @stock_id: the name of a stock item
  *
  * Creates a new #GtkRadioToolButton adding it to the same group as @group.
@@ -223,9 +225,9 @@ gtk_radio_tool_button_new_with_stock_from_widget (GtkRadioToolButton *group,
 {
   GSList *list = NULL;
   
-  g_return_val_if_fail (GTK_IS_RADIO_TOOL_BUTTON (group), NULL);
+  g_return_val_if_fail (group == NULL || GTK_IS_RADIO_TOOL_BUTTON (group), NULL);
 
-  if (group)
+  if (group != NULL)
     list = gtk_radio_tool_button_get_group (group);
   
   return gtk_radio_tool_button_new_from_stock (list, stock_id);
@@ -258,7 +260,7 @@ gtk_radio_tool_button_get_group (GtkRadioToolButton *button)
 /**
  * gtk_radio_tool_button_set_group:
  * @button: a #GtkRadioToolButton
- * @group: an existing radio button group
+ * @group: (transfer none) (element-type GtkRadioButton): an existing radio button group
  * 
  * Adds @button to @group, removing it from the group it belonged to before.
  *