[msitools] wixl: Product Comment is not mandatory

[Marc-Andre Lureau <malureau src gnome org>]

commit 407f3ce42c49d95c4795b4b7e89c47cf4e314bcb
Author: Marc-André Lureau <marcandre lureau gmail com>
Date:   Fri Apr 12 05:15:05 2013 +0200

    wixl: Product Comment is not mandatory

 tools/wixl/builder.vala |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/tools/wixl/builder.vala b/tools/wixl/builder.vala
index 0be32b0..a7405ad 100644
--- a/tools/wixl/builder.vala
+++ b/tools/wixl/builder.vala
@@ -273,7 +273,8 @@ namespace Wixl {
         }
 
         public override void visit_package (WixPackage package) throws GLib.Error {
-            db.info.set_comments (package.Comments);
+            if (package.Comments != null)
+                db.info.set_comments (package.Comments);
 
             if (package.Description != null)
                 db.info.set_subject (package.Description);