[glib] Ensure values are memset to 0 when calling G_VALUE_COLLECT_INIT()

[Benjamin Otte <otte src gnome org>]

commit 914120b9701650ccf7bede1907b69b521ca43236
Author: Benjamin Otte <otte redhat com>
Date:   Mon Jan 18 14:03:16 2010 +0100

    Ensure values are memset to 0 when calling G_VALUE_COLLECT_INIT()
    
    The reason we need to enforce this is that the GTypeValueTable
    documentation explicitly states that memory is memset to 0 when the
    value_init function is called.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=603590

 gobject/gobject.c         |    2 +-
 gobject/gsignal.c         |    4 ++--
 gobject/gvaluecollector.h |    3 +--
 3 files changed, 4 insertions(+), 5 deletions(-)
---
diff --git a/gobject/gobject.c b/gobject/gobject.c
index bf45d62..da2a505 100644
--- a/gobject/gobject.c
+++ b/gobject/gobject.c
@@ -1338,7 +1338,7 @@ g_object_new_valist (GType	  object_type,
 
   class = g_type_class_ref (object_type);
 
-  params = g_new (GParameter, n_alloced_params);
+  params = g_new0 (GParameter, n_alloced_params);
   name = first_property_name;
   while (name)
     {
diff --git a/gobject/gsignal.c b/gobject/gsignal.c
index 9004ee8..c7c1679 100644
--- a/gobject/gsignal.c
+++ b/gobject/gsignal.c
@@ -1971,7 +1971,7 @@ g_signal_chain_from_overridden_handler (gpointer instance,
       va_start (var_args, instance);
 
       signal_return_type = node->return_type;
-      instance_and_params = g_slice_alloc (sizeof (GValue) * (n_params + 1));
+      instance_and_params = g_slice_alloc0 (sizeof (GValue) * (n_params + 1));
       param_values = instance_and_params + 1;
 
       for (i = 0; i < node->n_params; i++)
@@ -2938,7 +2938,7 @@ g_signal_emit_valist (gpointer instance,
 
   n_params = node->n_params;
   signal_return_type = node->return_type;
-  instance_and_params = g_slice_alloc (sizeof (GValue) * (n_params + 1));
+  instance_and_params = g_slice_alloc0 (sizeof (GValue) * (n_params + 1));
   param_values = instance_and_params + 1;
 
   for (i = 0; i < node->n_params; i++)
diff --git a/gobject/gvaluecollector.h b/gobject/gvaluecollector.h
index c0aa790..d7f66e2 100644
--- a/gobject/gvaluecollector.h
+++ b/gobject/gvaluecollector.h
@@ -69,8 +69,7 @@ union _GTypeCValue
 
 /**
  * G_VALUE_COLLECT_INIT:
- * @value: a #GValue return location. @value is supposed to be clean (freshly
- * initialized and/or freed).
+ * @value: a #GValue return location. @value must contain only 0 bytes.
  * @_value_type: the #GType to use for @value.
  * @var_args: the va_list variable; it may be evaluated multiple times
  * @flags: flags which are passed on to the collect_value() function of