MIDI CC messages not sent to "split" MIDI out

[rjsmith]

If SPLIT: ON and MPE:ON, incoming channel-specific MIDI CC messages (e.g. CC 74 MPE timbre from a Linnstrument) is sent to the "midimech" MIDI out instead of the "split" MIDI OUT:

20:36:39.296 | RECEIVE    | ENDPOINT(LinnStrument MIDI) TYPE(CONTROLCHANGE) CHANNEL(11) DATA1(74) DATA2(74)
20:36:39.298 | RECEIVE    | ENDPOINT(IAC Driver midimech) TYPE(CONTROLCHANGE) CHANNEL(11) DATA1(74) DATA2(74)

[rjsmith]

With the fix, midi monitor shows the CC messages are now being routed to the correct midi out (with SPLIT: ON):

20:55:10.142 | RECEIVE    | ENDPOINT(LinnStrument MIDI) TYPE(CONTROLCHANGE) CHANNEL(12) DATA1(74) DATA2(113)
20:55:10.129 | RECEIVE    | ENDPOINT(IAC Driver split) TYPE(CONTROLCHANGE) CHANNEL(12) DATA1(74) DATA2(125)