Merge pull request #148 from wader/mpeg-spu-fatal-on-unknown-cmd

mpeg_spu: Fatal error on unknown cmd

format/mpeg/mpeg_spu.go

@@ -168,6 +168,8 @@ func spuDecode(d *decode.D, in interface{}) interface{} {
 								size := d.FieldU16("size")
 								// TODO
 								d.FieldRawLen("data", int64(size)*8)
+							default:
+								d.Fatalf("unknown command %d", cmd)
 							}
 						})
 					}