Segmentation: fixed wrapping problem

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

2_difspot/gtSegmentationDoubleThreshold.m

@@ -515,6 +515,7 @@ function sfWriteBlob(blob, stack, parameters)
 
         % put z into reference of the dataset
         blob_bb(3) = blob_bb(3) + stack.first - 1;
+        blob_bb(3) = mod(blob_bb(3), stack.totproj);
 
         gtWriteBlobToHDF5(stack.difblobdir, blob.difblobID, blob_vol, blob_bb, blob_mask);
     end