[gtk+/native-layout] Changed initial values for requisition from -1 to 0.

[Tristan Van Berkom <tvb src gnome org>]

commit 4b1315cedce54d5af15ddef456e460b887f0e96e
Author: Tristan Van Berkom <tristan van berkom gmail com>
Date:   Sun Apr 4 16:38:36 2010 -0400

    Changed initial values for requisition from -1 to 0.
    
    When doing size-requests and get_natural_size() calls, use 0 as
    the base value instead of -1, because size_request code assumes
    that widget->requesition is initialized at 0.

 gtk/gtksizegroup.c |    6 +++---
 gtk/gtkwidget.c    |   10 ++--------
 2 files changed, 5 insertions(+), 11 deletions(-)
---
diff --git a/gtk/gtksizegroup.c b/gtk/gtksizegroup.c
index 2dcde99..96772ee 100644
--- a/gtk/gtksizegroup.c
+++ b/gtk/gtksizegroup.c
@@ -670,9 +670,9 @@ do_size_request (GtkWidget *widget)
        * Note here that there is no convention of filling the argument or widget->requisition,
        * so we have no choice but to fire size request with this pointer.
        */
-      g_signal_emit_by_name (widget,
-			     "size-request",
-			     &widget->requisition);
+      widget->requisition.width  = 0;
+      widget->requisition.height = 0;
+      g_signal_emit_by_name (widget, "size-request", &widget->requisition);
 
       /* Now get the extended layout minimum and natural size
        */
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 0c7d12d..9f33530 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -10724,16 +10724,10 @@ gtk_widget_real_get_desired_size (GtkExtendedLayout *layout,
    * on the "size-request" collected values (see gtksizegroup.c:do_size_request()).
    */
   if (minimum_size)
-    {
-      minimum_size->width  = -1;
-      minimum_size->height = -1;
-    }
+    memset (minimum_size, 0x0, sizeof (GtkRequisition));
 
   if (natural_size)
-    {
-      natural_size->width  = -1;
-      natural_size->height = -1;
-    }
+    memset (natural_size, 0x0, sizeof (GtkRequisition));
 }
 
 static void