check pre-existing in ensembleSegValidateAll fixed

src/ensembleSegValidateAll.m

@@ -8,7 +8,7 @@ flist=dir(fullfile(ROOT,'**/*training*.LEVER'));
 
 % targets={'Fluo-N2DH-GOWT','Fluo-N2DH-SIM+','Fluo-N2DL-HeLa','PhC-C2DL-PSC',...
 %      'Fluo-N3DH-CHO_training','Fluo-N3DH-CE_training'};
-targets={'PhC-C2DL-PSC'};
+targets={'Fluo-N2DL-HeLa'};
 
 if exist('resEnsemble.mat','file')
     load 'resEnsemble.mat'
@@ -28,7 +28,7 @@ for ff=1:length(flist)
     % already processed?
     targetName=strrep(flist(ff).name,'_training','');
     targetName=strrep(targetName,'.LEVER','');
-    if find(cellfun(@(x) ~isempty(x),strfind(res.name,targetName)))
+    if ~isempty(res) && any(cellfun(@(x) ~isempty(x),strfind(res.name,targetName)))
         continue
     end