[glib] Finish the previous fix for GMutex, GRecMutex, GRWLock and GCond

[Jeffrey Stedfast <fejj src gnome org>]

commit dfbac178bdcbcb042be928dcbeaa87742b511836
Author: Jeffrey Stedfast <fejj gnome org>
Date:   Sun Jun 30 14:01:34 2013 -0400

    Finish the previous fix for GMutex, GRecMutex, GRWLock and GCond

 glib/gthread-posix.c |    3 +++
 glib/gthread-win32.c |    1 +
 2 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/glib/gthread-posix.c b/glib/gthread-posix.c
index d57a9cb..403a014 100644
--- a/glib/gthread-posix.c
+++ b/glib/gthread-posix.c
@@ -362,6 +362,7 @@ void
 g_rec_mutex_clear (GRecMutex *rec_mutex)
 {
   g_rec_mutex_impl_free (rec_mutex->p);
+  rec_mutex->p = NULL;
 }
 
 /**
@@ -519,6 +520,7 @@ void
 g_rw_lock_clear (GRWLock *rw_lock)
 {
   g_rw_lock_impl_free (rw_lock->p);
+  rw_lock->p = NULL;
 }
 
 /**
@@ -723,6 +725,7 @@ void
 g_cond_clear (GCond *cond)
 {
   g_cond_impl_free (cond->p);
+  cond->p = NULL;
 }
 
 /**
diff --git a/glib/gthread-win32.c b/glib/gthread-win32.c
index c54f2bd..1f832e3 100644
--- a/glib/gthread-win32.c
+++ b/glib/gthread-win32.c
@@ -198,6 +198,7 @@ void
 g_rec_mutex_clear (GRecMutex *mutex)
 {
   g_rec_mutex_impl_free (mutex->p);
+  mutex->p = NULL;
 }
 
 void