Shall GtkAllocation be initialized before use?

["Mikhail Titov" <mlt gmx us>]

I’ve noticed that I’m getting the following errors with Gtk+ (3.1.18-23-gb53a66b) and MS VC++. Am I missing something during the build process or indeed those variables are not initialized? Can I simply ignore run-time checks? Exception occurs around line 2169 in gtktreeviewcolumn.c when calling gdk_window_move_resize() from gtk3-demo.exe .

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---------------------------
Microsoft Visual C++ Debug Library
---------------------------
Debug Error!

Program: C:\gtkmm\bin\gtk3-demo.exe
Module: C:\gtkmm\bin\gtk-3.1-vc90-d.dll
File: 

Run-Time Check Failure #3 - The variable 'allocation' is being used without being initialized.

(Press Retry to debug the application)
---------------------------
Abort   Retry   Ignore   
---------------------------
---->8--------------------------------------------------8<--------

I can avoid this error with something like

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diff --git a/gtk/gtktreeviewcolumn.c b/gtk/gtktreeviewcolumn.c
index af79da7..f8a32a3 100644
--- a/gtk/gtktreeviewcolumn.c
+++ b/gtk/gtktreeviewcolumn.c
@@ -2138,7 +2138,7 @@ _gtk_tree_view_column_allocate (GtkTreeViewColumn *tree_column,
 				int                width)
 {
   GtkTreeViewColumnPrivate *priv;
-  GtkAllocation             allocation;
+  GtkAllocation             allocation = {0};
   gboolean                  rtl;
 
   g_return_if_fail (GTK_IS_TREE_VIEW_COLUMN (tree_column));
---->8--------------------------------------------------8<--------

Mikhail