[Cin] Forgot small piece of patch for netbsd

[Andrew Randrianasulu]

remove FFMPEG3 define
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20231216/1e371c37/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0009-Change-NetBSD-build-script-configure-to-ffmpeg-v6.patch
Type: text/x-diff
Size: 1760 bytes
Desc: not available
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20231216/1e371c37/attachment.bin>