Backport SAR fix 18f9d1fda5f825cc1c87d4eca1fb2f53cca6e130 from 2.x.
Merge branch 'master' of git.carlh.net:git/dcpomatic
Merge branch 'master' of git.carlh.net:git/dcpomatic
Timecode set() fps should be float (from v2 36d6c770082028547da0a6faf02410d858da02c0)