[mythtv] updatetimestamp field in dtv_multiplex table unused?

[Bruce Markey]

Bruce Markey wrote:
...
> So what's an acceptable syntax for 3.23.x?
> 
> 
> libs/libmythtv/dbcheck.cpp:2023
> 
> - "  `updatetimestamp` timestamp NOT NULL default CURRENT_TIMESTAMP"
> - "                              on update CURRENT_TIMESTAMP,"
> + ???

Of course, the answer is in the file. Changed this to the syntax
from the update where dtv_multiplex was first created.

--  bjm