Update fillminima code to only allocate memory which needs to be further processed.

[GoogleCodeExporter]

Should get a speed increase with this.  Since we won't be allocating and 
freeing memory in small chunks all the time for no particular reason.

Essentially the idea is to remove the neighbors routine and replace the inner 
while loop with its looping. (Simpler said than done!!)

Original issue reported on code.google.com by rd.alt.5...@gmail.com on 3 Nov 2014 at 6:28