[perl-Glib-Object-Introspection] Error out if asked to create boxed struct of unknown size

[Torsten SchÃnfeld <tsch src gnome org>]

commit 6138c1983cf78563f97a0db8b04ba58ce9438574
Author: Torsten SchÃnfeld <kaffeetisch gmx de>
Date:   Wed Jan 30 00:29:39 2013 +0100

    Error out if asked to create boxed struct of unknown size

 GObjectIntrospection.xs |   15 ++++++++++-----
 1 files changed, 10 insertions(+), 5 deletions(-)
---
diff --git a/GObjectIntrospection.xs b/GObjectIntrospection.xs
index df7aa1a..dcd9555 100644
--- a/GObjectIntrospection.xs
+++ b/GObjectIntrospection.xs
@@ -538,17 +538,22 @@ _construct_boxed (class, package)
     CODE:
 	gtype = gperl_boxed_type_from_package (package);
 	if (!gtype)
-		croak ("Could not find GType for package %s", package);
+		ccroak ("Could not find GType for package %s", package);
 	repository = g_irepository_get_default ();
 	info = g_irepository_find_by_gtype (repository, gtype);
 	if (!info) {
 		g_base_info_unref (info);
-		croak ("Could not fetch information for package %s; "
-		       "perhaps it has not been loaded via "
-		       "Glib::Object::Introspection?",
-		       package);
+		ccroak ("Could not fetch information for package %s; "
+		        "perhaps it has not been loaded via "
+		        "Glib::Object::Introspection?",
+		        package);
 	}
 	size = g_struct_info_get_size (info);
+	if (!size) {
+		g_base_info_unref (info);
+		ccroak ("Cannot create boxed struct of unknown size for package %s",
+		        package);
+	}
 	/* We allocate memory for the boxed type here with malloc(), but then
 	 * take a copy of it and discard the original so that the memory we
 	 * hand out is always allocated with the allocator used for the boxed