[Cin] glitches in audio resources on timeline

[Rob Prowel]

at zoomed-in scale the audio timelines randomly drops/shifts the level 
bars in short bursts.

Will attempt to add PNG file that shows this behaviour.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: audio-levels.png
Type: image/png
Size: 52222 bytes
Desc: not available
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20230104/d23d2aed/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_0x36472CAD382840B8.asc
Type: application/pgp-keys
Size: 632 bytes
Desc: OpenPGP public key
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20230104/d23d2aed/attachment-0001.skr>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature
Type: application/pgp-signature
Size: 236 bytes
Desc: OpenPGP digital signature
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20230104/d23d2aed/attachment-0001.sig>