libcamera: controls: Move ControlValue size check to controls.cpp

The size of the ControlValue class is checked by a static_assert() to
avoid accidental ABI breakages. There's no need to perform the check
every time controls.h is included, move it to controls.cpp.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/controls.cpp

@@ -86,6 +86,8 @@ static constexpr size_t ControlValueSize[] = {
  * \brief Abstract type representing the value of a control
  */
 
+static_assert(sizeof(ControlValue) == 16, "Invalid size of ControlValue class");
+
 /**
  * \brief Construct an empty ControlValue.
  */