libcamera: base: object: Forward arguments when invoking

Use `std::forward()` to forward the received arguments to enable the
potential use of move constructors instead of copy constructors.

Commit 0eacde623b ("libcamera: object: Avoid argument copies in invokeMethod()")
added the forwarding references to `invokeMethod()` but it did not add the
appropriate `std::forward()` calls, so copying could still take place
even if not necessary.

Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

include/libcamera/base/object.h

@@ -9,6 +9,7 @@
 
 #include <list>
 #include <memory>
+#include <utility>
 #include <vector>
 
 #include <libcamera/base/bound_method.h>
@@ -39,7 +40,7 @@ public:
 	{
 		T *obj = static_cast<T *>(this);
 		auto *method = new BoundMethodMember<T, R, FuncArgs...>(obj, this, func, type);
-		return method->activate(args..., true);
+		return method->activate(std::forward<Args>(args)..., true);
 	}
 
 	Thread *thread() const { return thread_; }