Add destructors for the config objects. (#422)

This CL adds default destructors for the Vulkan and Dawn config objects.
the EngineConfig object destructor is set to virtual.

Issue #277.

1 files changed, 3 insertions, 1 deletions

diff --git a/include/amber/amber.h b/include/amber/amber.h
index e0bc794..694b40b 100644
--- a/include/amber/amber.h
+++ b/include/amber/amber.h
@@ -39,7 +39,9 @@ enum EngineType {
 };
 
 /// Override point of engines to add their own configuration.
-struct EngineConfig {};
+struct EngineConfig {
+  virtual ~EngineConfig();
+};
 
 struct BufferInfo {
   BufferInfo();