Use = default to define trivial dtor/ctor

Alc/backends/base.cpp

@@ -24,8 +24,7 @@ ClockLatency GetClockLatency(ALCdevice *device)
 BackendBase::BackendBase(ALCdevice *device) noexcept : mDevice{device}
 { }
 
-BackendBase::~BackendBase()
-{ }
+BackendBase::~BackendBase() = default;
 
 ALCboolean BackendBase::reset()
 { return ALC_FALSE; }

Alc/effects/null.cpp

@@ -25,16 +25,12 @@ struct ALnullState final : public EffectState {
 /* This constructs the effect state. It's called when the object is first
  * created.
  */
-ALnullState::ALnullState()
-{
-}
+ALnullState::ALnullState() = default;
 
 /* This destructs the effect state. It's called only when the effect slot is no
  * longer used prior to being freed.
  */
-ALnullState::~ALnullState()
-{
-}
+ALnullState::~ALnullState() = default;
 
 /* This updates the device-dependant effect state. This is called on
  * initialization and any time the device parameters (eg. playback frequency,