Bug in `align_move.R` line 181

[dmkaplan2000]

I believe line 181 of the file aligne_move.R has an error. Currently that line reads:

  m_aligned <- m_aligned[order(m_aligned$timestamp),]

But at this point the column timestamp doesn't exist as it is renamed mt_time_column(m) line 161 of that file. I think that Line 181 should read:

  m_aligned <- m_aligned[order(mt_time(m_aligned)),]

Forgive me if I have misunderstood, but align_move does not work for me with a move2 object that has the time column named something other than timestamp.