Compiler sometimes drops MML after encountering syntax error without reporting it

[atsushieno]

Similar issue, to issue #25, but probably different:

1 @58 o3 80  o5c

There is a syntax error at 80 but it is not reported as an error.

    fun tokenizerShouldReportError() {
        val mml = "1 @58 o3 80  o5c"
        assertFails("should report syntax error at orphan number token") { MmlTestUtility.testCompile2("midi2", mml) }
        assertFails("should report syntax error at orphan number token") { MmlTestUtility.testCompile("midi1", mml) }
    }