[Ipopt] Major memory leak in Matlab interface

[Peter Carbonetto]

A message to all users of the Matlab interface for IPOPT:

I've discovered a memory leak in the Matlab interface. This has now been 
fixed. If you are using the Matlab interface to solve large problems, I 
would recommend downloading the "trunk" version of IPOPT with the updated 
version of the Matlab interface.

Peter Carbonetto, Ph.D.
Postdoctoral Researcher
Dept. of Human Genetics
University of Chicago