[mythtv] Why do we reject previously shown dates before 1940

[Bill Meek]

On 12/6/20 4:16 PM, Gary Buhrmaster wrote:
> I suspect that Schedules Direct uses the
> release date for originalairdate for movies
> when it can be determined.

FWIW, mythfilldatabase converts these to originalairdate:

$ grep previously-shown grabber.out |grep '"193'
  <previously-shown start="19370514 +0000" />
  <previously-shown start="19380218 +0000" />

https://code.mythtv.org/cgit/mythtv/tree/mythtv/programs/mythfilldatabase/xmltvparser.cpp#n466

-- 
Bill