musescore/MuseScore — pull request #1197 by MarcSabatella (2014-08-22 03:18:44+00:00)
Title: fix #30151: first ottava of 1.3 score can mess up playback of following notes

Apparently an ottava on the first note of a score might be missing a "tick" tag, and the default of -1 means the length is too large by 1 now, which can affect playback of subsequent notes (and possibly layout in some cases). This fixes that.