Merge lp:~kdub/unity-system-compositor/silo0-n7-fix into lp:~mir-team/unity-system-compositor/silo0

[Kevin DuBois]

Return immeditately if there is no default surface in the window resizing code.

[Gerry Boland (gerboland)]

review: Approve

=== modified file 'src/window_manager.cpp'
--- src/window_manager.cpp	2015-08-04 21:16:54 +0000
+++ src/window_manager.cpp	2015-08-11 13:03:27 +0000
@@ -157,11 +157,14 @@
     std::cout << "Intersection: " << intersection << std::endl;
 
     // Now resize all surfaces in scene to this value
+    // TODO: (kdub) have Mir provide an easier route for this operation
     for (auto &session : sessions)
     {
         auto first = session->default_surface();
+        if (!first) return;
         first->resize(intersection.size);
         auto next = session->surface_after(first);
+        if (!next) return;
         while (next != first)
         {
             next->resize(intersection.size);