minecraft/protocol: Read and write sound positions correctly (#250)

minecraft/protocol/reader.go

@@ -151,7 +151,7 @@ func (r *Reader) SubChunkPos(x *SubChunkPos) {
 // SoundPos reads an mgl32.Vec3 that serves as a position for a sound.
 func (r *Reader) SoundPos(x *mgl32.Vec3) {
 	var b BlockPos
-	r.BlockPos(&b)
+	r.UBlockPos(&b)
 	*x = mgl32.Vec3{float32(b[0]) / 8, float32(b[1]) / 8, float32(b[2]) / 8}
 }
 

minecraft/protocol/writer.go

@@ -123,7 +123,7 @@ func (w *Writer) SubChunkPos(x *SubChunkPos) {
 // SoundPos writes an mgl32.Vec3 that serves as a position for a sound.
 func (w *Writer) SoundPos(x *mgl32.Vec3) {
 	b := BlockPos{int32((*x)[0] * 8), int32((*x)[1] * 8), int32((*x)[2] * 8)}
-	w.BlockPos(&b)
+	w.UBlockPos(&b)
 }
 
 // RGB writes a color.RGBA x as 3 float32s to the underlying buffer.