mutliple calls to initialize fail, even if free is called

[GoogleCodeExporter]

when calling the setup, doing something, then free the library
the next call to setup fails with 

At line 240 of file setup.F90
Fortran runtime error: Attempting to allocate already allocated variable 'iiist'

this type of situation occurs when upsampling a field in Fourier space. The 
first FFT and teh subsequent IFFT do not have the same sizes, thus multiple 
setups are required.

Original issue reported on code.google.com by thomas.s...@gmail.com on 16 Jan 2015 at 2:32