Require @(init) and @(fini) to be proc "contextless" ()

core/image/png/png.odin

@@ -1611,6 +1611,6 @@ defilter :: proc(img: ^Image, filter_bytes: ^bytes.Buffer, header: ^image.PNG_IH
 }
 
 @(init, private)
-_register :: proc() {
+_register :: proc "contextless" () {
 	image.register(.PNG, load_from_bytes, destroy)
 }