[seed] Fixing GType constructor exception

[Danilo Cesar Lemes de Paula <danilocesar src gnome org>]

commit ddac8d8757ca74e3f7b25e4e3ca17e733b8294db
Author: Danilo Cesar Lemes de Paula <danilo cesar collabora co uk>
Date:   Thu Oct 6 13:59:00 2016 -0300

    Fixing GType constructor exception
    
    When a constructor raises an exception it needs to return NULL.
    WebKitAPI excepts an JSObjectRef for object constructor, we can't
    return a JSValueRef with a NULL value and expect that webkit will be OK
     with that.
    
    Fixing this also fix some tests that were XFAIL-ing and
    now passes.

 libseed/seed-gtype.c                |    2 +-
 tests/javascript/gtypes/Makefile.am |    1 -
 2 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/libseed/seed-gtype.c b/libseed/seed-gtype.c
index 55f9e62..3417cf2 100644
--- a/libseed/seed-gtype.c
+++ b/libseed/seed-gtype.c
@@ -807,7 +807,7 @@ seed_gtype_constructor_invoked(JSContextRef ctx,
         seed_make_exception(ctx, exception, "TypeError",
                             "GType constructor expected GType for parent");
 
-        return (JSObjectRef) JSValueMakeNull(ctx);
+        return NULL;
     }
 
     // TODO: GType is of variable length, so this is an incorrect fix
diff --git a/tests/javascript/gtypes/Makefile.am b/tests/javascript/gtypes/Makefile.am
index 320184b..11bc873 100644
--- a/tests/javascript/gtypes/Makefile.am
+++ b/tests/javascript/gtypes/Makefile.am
@@ -32,7 +32,6 @@ TESTS = \
        gtype-signal.js
 
 XFAIL_TESTS = \
-       gtype-typerror.js \
        $(NULL)
 
 -include $(top_srcdir)/git.mk