using rdann on LTSTDB misses some annotations for some sessions

[ranxiao]

when using rdann on LTSTDB misses some annotations for some sessions.
E.g., for subject s20081, the last few line of comments is below:

'(rtst1-52'
'(st0-52'
'ast0-109'
'artst1-88'
'rtst1-45)'

there is no end time point for st0 episode.
This problem actually plagues quite a number of sessions.
I am not sure if it has something to do with the starting index 1 in Matlab, while 0 in the toolbox, although it's noted in the description of the function.