[libchamplain] champlain-view: Add valid bouding-box check for champlain_view_set_world

[Jiří Techet <jiritechet src gnome org>]

commit 635b8fb6ea2991450e5ea0d3e45c0bb4b01cb2b6
Author: Marius Stanciu <stanciumarius94 gmail com>
Date:   Sat Apr 2 19:31:05 2016 +0300

    champlain-view: Add valid bouding-box check for champlain_view_set_world
    
    https://bugzilla.gnome.org/show_bug.cgi?id=764433

 champlain/champlain-view.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/champlain/champlain-view.c b/champlain/champlain-view.c
index 97d2f01..bb4850c 100644
--- a/champlain/champlain-view.c
+++ b/champlain/champlain-view.c
@@ -2013,6 +2013,9 @@ champlain_view_set_world (ChamplainView *view,
   g_return_if_fail (CHAMPLAIN_IS_VIEW (view));
   g_return_if_fail (bbox != NULL);
 
+  if (!champlain_bounding_box_is_valid (bbox))
+    return;
+
   ChamplainViewPrivate *priv = view->priv;
   gdouble latitude, longitude;