[vala] Treat signal parameters that have G_TYPE_STRING type as strings.

[Luca Bruno <lucabru src gnome org>]

commit a31a2a77dd60e701374487518c6c843ed7b020ea
Author: Avi Levy <avi w levy gmail com>
Date:   Mon Jun 3 16:06:42 2013 -0500

    Treat signal parameters that have G_TYPE_STRING type as strings.
    
    Fixes bug 701488

 codegen/valagsignalmodule.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/codegen/valagsignalmodule.vala b/codegen/valagsignalmodule.vala
index dceb8d2..2e82316 100644
--- a/codegen/valagsignalmodule.vala
+++ b/codegen/valagsignalmodule.vala
@@ -54,7 +54,7 @@ public class Vala.GSignalModule : GObjectModule {
                        return "gpointer";
                } else if (t is VoidType) {
                        return "void";
-               } else if (t.data_type == string_type.data_type) {
+               } else if (get_ccode_type_id (t.data_type) == get_ccode_type_id (string_type.data_type)) {
                        return "const char*";
                } else if (t.data_type is Class || t.data_type is Interface) {
                        return "gpointer";