take env hostname to have rzg and check better default machine

git-svn-id: https://spcsvn.epfl.ch/repos/TCV/gdat/trunk@6702 d63d8f72-b253-0410-a779-e742ad2e26cf

crpptbx/gdat.m

@@ -82,8 +82,7 @@ default_machine = 'tcv';
 if ~isempty(fusion_machine_defaultname)
   default_machine = lower(fusion_machine_defaultname);
 else
-  [s,hostname]=unix('hostname -a');
-  if s || isempty(hostname), hostname=getenv('HOSTNAME');end
+  hostname=getenv('HOSTNAME');
   if ~isempty(regexpi(hostname,'epfl'))
     default_machine = 'tcv';
   elseif ~isempty(regexpi(hostname,'rzg.mpg'))