[pygobject/pygobject-3-4] Fix crash with GLib.child_watch_add

[Martin Pitt <martinpitt src gnome org>]

commit a06e0d021d74c95cd517abb3e6ef5ff0037de679
Author: Daniel Narvaez <dwnarvaez gmail com>
Date:   Sun Nov 11 00:51:12 2012 +0100

    Fix crash with GLib.child_watch_add
    
    Was sometimes crashing when the destroy notify was called.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=688067

 gi/_glib/glibmodule.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gi/_glib/glibmodule.c b/gi/_glib/glibmodule.c
index 4dea68c..7d70a07 100644
--- a/gi/_glib/glibmodule.c
+++ b/gi/_glib/glibmodule.c
@@ -351,9 +351,15 @@ static void
 child_watch_dnotify(gpointer data)
 {
     struct _PyGChildData *child_data = (struct _PyGChildData *) data;
+    PyGILState_STATE gil;
+
+    gil = pyglib_gil_state_ensure();
+
     Py_DECREF(child_data->func);
     Py_XDECREF(child_data->data);
     g_slice_free(struct _PyGChildData, child_data);
+
+    pyglib_gil_state_release(gil);
 }