Cycles: Fix wrong render result in certain configuration of render layer's surface/hair

There were some synchronization missing in cases when only one of those settings
was disabled.

Also added a render test for such configurations now.

intern/cycles/render/mesh.cpp

@@ -135,7 +135,7 @@ void Mesh::clear()
 	transform_applied = false;
 	transform_negative_scaled = false;
 	transform_normal = transform_identity();
-	geometry_synced = false;
+	geometry_flags = GEOMETRY_NONE;
 }
 
 int Mesh::split_vertex(int vertex)