tests: ensure Object::bound is initialized

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Tobin Ehlis <tobin@lunarg.com>
diff --git a/tests/vktestbinding.h b/tests/vktestbinding.h
index 89aee53..def76e2 100644
--- a/tests/vktestbinding.h
+++ b/tests/vktestbinding.h
@@ -154,7 +154,7 @@
     explicit Object(const Device &dev, VkObject obj, VkObjectType object_type) :
         dev_(&dev),
         mem_alloc_count_(0), internal_mems_(NULL),
-        primary_mem_(NULL) { init(obj, object_type); }
+        primary_mem_(NULL), bound(false) { init(obj, object_type); }
     ~Object() { cleanup(); }
 
     void init(VkObject obj, VkObjectType object_type, bool own);