add dim if not existing

git-svn-id: https://spcsvn.epfl.ch/repos/TCV/gdat/trunk@5190 d63d8f72-b253-0410-a779-e742ad2e26cf

crpptbx/gdat.m

@@ -166,6 +166,7 @@ try
 catch
   warning(['problems calling gdat_' lower(machine_eff)]);
   if ~exist('gdat_data'); gdat_data.data = []; end
+  if  ~isfield(gdat_data,'dim'); gdat_data.dim=[]; end
   if ~exist('gdat_params'); gdat_params.plot = []; end
   if ~exist('error_status'); error_status = 998; end
   return