Fixed bug in gtPostSegmentation

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

2_difspot/gtDBBlob2SpotTable.m

@@ -368,7 +368,7 @@ function sfDoInsert(spot, difspot_table)
 end
 
 function writeDifspotToEDF(spot, index)
-    sub_dir = fullfile('2_difspot', sprintf('%05d', difID - mod(difID, 1e4)));
+    sub_dir = fullfile('2_difspot', sprintf('%05d', index - mod(index, 1e4)));
     if (~exist(sub_dir, 'dir'))
         [status, message, messageid] = mkdir(sub_dir);
         if (~status)