Incorrect function registration warning on private class members

[tomwyr]

Code analysis shows following warning when a private method is called, even though it's not visible to Godot (private2 in this case):

Overrides registered abstract function without registering itself. Without explicit @RegisterFunction annotation on overridden functions, they cannot be called from godot.

@RegisterClass
class Test : Node2D() {
    fun public1() {
        public2()
    }

    // Warning
    fun public2() {

    }

    private fun private1() {
        private2()
    }

    // Warning
    private fun private2() {

    }
}

• the warning doesn't show up for private1 which doesn't get called
• the warning shows up for public2 but not for public1 (I'm not sure if it's intended behavior for public members)