CmdSetSampleMaskEXT is not passing address of sampleMask[0] to trampoline

[bbredesen]

Signature: func CmdSetSampleMaskEXT(commandBuffer CommandBuffer, samples SampleCountFlagBits, sampleMask []SampleMask)

sampleMask is correctly defined as a slice. This function is unusual because the size of the slice is encoded in a bitfield, rather than directly provided.

The pointer being provided to the trampoline is a direct assignment of the slice, rather than the address first element.

Currently generated code:

	var pSampleMask *SampleMask
	if sampleMask != nil {
		pSampleMask = sampleMask
	}

Expected output:

	var pSampleMask *SampleMask
	if sampleMask != nil {
		pSampleMask = &sampleMask[0]
	}