TAStudio ArgumentOutOfRangeException at read-only movie end about bizhawk HOT 2 CLOSED

Fixed. TAStudio does substring operations on the movie mnemonic strings to set 
the controller pads. When the movie ends, the mnemonic strings are empty, and 
doing substring operations on an empty string is probably going to cause some 
out of range issues. I just added a condition to prevent this from happening 
and it seems to work.

Note: In your screenshot, your frame numbers are shown in full. For whatever 
reason, 5 digit numbers are displayed as 10..., 11..., etc. on my computer. I 
think this might have to do with my operating system and not any recent changes 
to TAStudio. Let me know if you don't have this issue on the latest revision.

Verified fixed in r2098; thanks. The problem with the TAStudio 5-digit frame 
count being displayed as XX... is because the frame column in the table is too 
narrow, in the screenshot I already worked around this problem by increasing 
the column size by dragging in the table header. I'll file a new issue for this.