[libchamplain] Add missing locking for set_tile_size

[Pierre-Luc Beaudoin <plbeaudoin src gnome org>]

commit 8d7cb23c1df7948a4e9daea0650930b11a9ec891
Author: Simon Wenner <simon wenner ch>
Date:   Mon Jun 29 10:46:17 2009 +0200

    Add missing locking for set_tile_size

 champlain/champlain-memphis-map-source.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/champlain/champlain-memphis-map-source.c b/champlain/champlain-memphis-map-source.c
index ea8fc27..c3af292 100644
--- a/champlain/champlain-memphis-map-source.c
+++ b/champlain/champlain-memphis-map-source.c
@@ -328,7 +328,9 @@ champlain_memphis_map_source_set_tile_size (ChamplainMemphisMapSource *self,
 
   ChamplainMemphisMapSourcePrivate *priv = GET_PRIVATE(self);
 
+  g_static_rw_lock_writer_lock (&MemphisLock);
   memphis_renderer_set_resolution (priv->renderer, size);
+  g_static_rw_lock_writer_unlock (&MemphisLock);
   g_object_set (G_OBJECT (self), "tile-size", size, NULL);
 }