playlist: Fix crasher with playlists using reserved columns.
I introduced this bug in commit a800c1b3 trying to fix a different memory mis-using bug. Sigh. In this case playlists that reserve additional columns would get a valid memory assignment but would be copied into the memory block incorrectly. This needed a back_inserter as well. Thanks to Markus for pointing out the regression, then opening a bug, then leaving a comment to point out both of these, and then drafting a patch that fixes the bug. I can confirm it works in my testing, it also seems to address a bug relating to playback stopping abrupting at the end of a track instead of skipping to the next track, but who knows at this point. BUG:420718 FIXED-IN:20.04.1
Showing with 1 addition and 1 deletion