RTP-MIDI strange field masks?

[Martin Mathieson via Wireshark-dev <wireshark-dev () wireshark org>]

These mask fields (0x7f7f, 0x7f7f7f7f, etc) look wrong to me, but I am
worried I might be missing something?
Looking at an example in RFC 4695 (Song Position Pointer) I think this (on
page 157) is saying that is it just a 2-byte field (and should therefore
have a non-mask of 0x0)?

| Song Position Pointer          | 11110010 0xxxxxxx 0yyyyyyy |


These warnings are from ./tools/check_typed_item_calls.py --mask


Warning:  epan/dissectors/packet-rtp-midi.c filter= rtpmidi.deltatime_2  -
mask with non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter= rtpmidi.deltatime_3  -
mask with non-contiguous bits 0x7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter= rtpmidi.deltatime_4  -
mask with non-contiguous bits 0x7f7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter= rtpmidi.pitch_bend  -
mask with non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sj_chapter_x_first_2  - mask with non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sj_chapter_x_first_3  - mask with non-contiguous bits 0x7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sj_chapter_x_first_4  - mask with non-contiguous bits 0x7f7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.song_position_pointer  - mask with non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_general_information_device_family  - mask
with non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_general_information_device_family_member
 - mask with non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_general_information_software_revision  -
mask with non-contiguous bits 0x7f7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_sample_dump_sample_number  - mask with
non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_sample_dump_sample_period  - mask with
non-contiguous bits 0x7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_sample_dump_sample_length  - mask with
non-contiguous bits 0x7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_sample_dump_loop_start  - mask with
non-contiguous bits 0x7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_sample_dump_loop_end  - mask with
non-contiguous bits 0x7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_sample_dump_lp_trans_ln  - mask with
non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_non_realtime_fd_length  - mask with non-contiguous
bits 0x7f7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_tune_freq  - mask with non-contiguous bits 0x7f7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_rt_ni_barnum  - mask with non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_rt_dc_volume  - mask with non-contiguous bits 0x7f7f
Warning:  epan/dissectors/packet-rtp-midi.c filter=
rtpmidi.sysex_common_rt_dc_balance  - mask with non-contiguous bits 0x7f7f

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