use note numbers for octave tracking range checks

so things like C♭ or B♯ (which are situated across octave boundaries)
won’t underflow or overflow the pitch/note number

same as MirBSD commitid 10061C139CF78FE4B09

mmllib/mml.py

@@ -252,12 +252,12 @@ def mml(macro, _nplay=None, _barline=None, _mmltrk=None):
 
             # octave tracking implementation
             if octave_tracking and not octave_tracking_onhold:
-                if (octave < 6) and (abs(note - octave_tracking_last_note) >
+                if (note < 72) and (abs(note - octave_tracking_last_note) >
                   abs(note + 12 - octave_tracking_last_note)):
                     normml[0] += ">"
                     octave += 1
                     note += 12
-                if (octave > 0) and (abs(note - octave_tracking_last_note) >
+                if (note >= 12) and (abs(note - octave_tracking_last_note) >
                   abs((note - 12) - octave_tracking_last_note)):
                     normml[0] += "<"
                     octave -= 1