Log Message:
Update to 20111021

Changelog:
October 21 2011

Abc2midi bug: %%MIDI control command after a rest causes loss of
synchronization. In the following example

X:1
T: Synchronization Loss after rest (z2)
V:1
V:2
M: 4/4
K:F#dor
V:1
|: A,G, | F,G,F,G, A,B,A,G, | F,4-F,2 :|
V:2
%%MIDI program 65
|:\
%%MIDI control 7 40
 de|  f4 z2
%%MIDI control 7 80
GA|  f4-f2\
:|

The control command is used to modulate the loudness of the alto saxophone
in voice 2. The second control command which attenuates the saxophone
to velocity 80 introduces another delay of z2 causing the following
notes G and A to be played one beat late (into the next bar).

Analysis: The second control command introduces a beat delay because
delta_time is not zero when the function write_event is called. (Delta_time
is not zero after a rest so that the following note will be delayed.)

Fix: write_event should not introduce any delay, so that delta_time was
replaced by 0 in the function call mf_write_midi_event(..). The function
write_event is also called to turn on (off) portamento, to handle
pitch_bend, pedal on and pedal off MIDI commands. (Hopefully, this
change does not introduce a bug in the other functions.)