Fix plan diff baseline for 64 bit builds

the autobuild runs the solver for most of the examples and compares against a 
baseline. that baseline was created on a 32 bit machine, so that the ouput if 
slightly different on a 64 bit machine.

for this reason plan diff is currently disabled on 64-bit machines (see 
"run-diff" target in the master build.xml file).
We need to fix this, ideally we should be able to keep a single baseline for 
32-bit and 64-bit, it maybe just a matter of outputting infinity as a symbol 
instead of a number.

Original issue reported on code.google.com by javier.barreiro@gmail.com on 17 Aug 2011 at 10:23

jariba / europa-pso

Fix plan diff baseline for 64 bit builds #138