do not run critical example on 32 bit Linux (so we can run all the other tests

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robustbase@637 694ef91d-65df-0310-b7bb-92e67a308ead
speedup: pass matrix column to rfmahad() instead of first copying it.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robustbase@638 694ef91d-65df-0310-b7bb-92e67a308ead