[vala] Only register GObject properties with valid names

[Jürg Billeter <juergbi src gnome org>]

commit 03f8fa6cf217e757b7c269279847ab26fc8d11d8
Author: Jürg Billeter <j bitron ch>
Date:   Mon Jul 27 17:53:36 2009 +0200

    Only register GObject properties with valid names
    
    Fixes bug 547252.

 codegen/valagobjectmodule.vala |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/codegen/valagobjectmodule.vala b/codegen/valagobjectmodule.vala
index 248d0fc..700d5c1 100644
--- a/codegen/valagobjectmodule.vala
+++ b/codegen/valagobjectmodule.vala
@@ -700,6 +700,11 @@ internal class Vala.GObjectModule : GTypeModule {
 			}
 		}
 
+		if (!prop.name[0].isalpha ()) {
+			// GObject requires properties to start with a letter
+			return false;
+		}
+
 		return true;
 	}
 }