Robin Gareus 23010a910d Be liberal about what to accept
This addressee a bug where ardour 6 was able to write negative
duration `length="-1"` `length-beats="-3.3650500597559585e-05"`

Ideally timecnt_t::string_to should check for invalid,
negative, duration. But this also catches a more generic case.

```
exception at str.substr (1)
#3 Temporal::timepos_t::string_to (this=0x7fffffff7bb0, str="") at libs/temporal/timeline.cc:904
#4 Temporal::timecnt_t::string_to (this=0x7fffffff7ba0, str="-2") at libs/temporal/timeline.cc:294
#5 PBD::string_to<Temporal::timecnt_t> (str="-2") at libs/ardour/ardour/types_convert.h:131
```
2022-10-16 22:30:35 +02:00
2022-04-08 19:51:02 +02:00
2022-10-16 22:30:35 +02:00
2022-04-08 19:51:02 +02:00
2022-10-11 17:07:33 +02:00
2020-10-18 17:45:32 +02:00
2020-07-06 21:36:12 +02:00
2021-03-23 23:27:45 +01:00
2022-10-11 17:07:33 +02:00

Please see the Ardour web site at https://ardour.org/ for all documentation..

For information on building ardour: 
      
     https://ardour.org/development.html
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