- call SetData in VKBuffer::Lock so that the buffer is valid.

This allows models to render, but a proper fix should handle mapping of static buffers for real. This workaround just allocates a non-static persistent buffer in CPU memory which is not the most efficient solution here.

src/rendering/vulkan/system/vk_buffers.cpp

@@ -110,6 +110,7 @@ void VKBuffer::Unmap()
 
 void *VKBuffer::Lock(unsigned int size)
 {
+	SetData(size, nullptr, false);
 	if (!mPersistent)
 		map = mBuffer->Map(0, size);
 	return map;