[Research] Bug fixing in dsut.c

[Joey (QuanSheng) Liang]

A bug has been fixed and committed. It was in 
dset/dsut.c::run_clever_symbolize(...).
At least sprat and ASL use the function in visualization part. If you 
encounter the crash related to these, please update your code.

-- 
Joey (QuanSheng) Liang
Auton Lab, RI, SCS, Carnegie Mellon University
W: http://www.AutonLab.org/
P: http://www.ChemiLab.net/