Make sure that the code still compiles with the freaking paranoid gcc warning options...

Make sure that the code still compiles with the freaking paranoid gcc warning options, now that they can be turned on again (mainly assigning dummy values to variables which get initialised within a TRY/CATCH block)

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@1687 48e7efb5-ca39-0410-a469-dd3cf9ba447f