Description: Fix slicing error revealed by numpy 1.9.0.
 Numpy 1.9.0 no longer allows oversize data to be assigned to a
 boolean indexed 1-d array by discarding excess elements.
Author: Charles Harris <charlesr.harris@gmail.com>
Origin: 7a074d5dd165536cb05fd87ea94a29510edac1a7
Date: Fri, 4 Jul 2014 20:04:32 -0600
Bug: https://github.com/scikit-image/scikit-image/issues/1050

--- a/skimage/segmentation/_join.py
+++ b/skimage/segmentation/_join.py
@@ -124,7 +124,7 @@ def relabel_sequential(label_field, offs
     if m == len(labels0):  # nothing to do, already 1...n labels
         return label_field, labels, labels
     forward_map = np.zeros(m + 1, int)
-    forward_map[labels0] = np.arange(offset, offset + len(labels0) + 1)
+    forward_map[labels0] = np.arange(offset, offset + len(labels0))
     if not (labels == 0).any():
         labels = np.concatenate(([0], labels))
     inverse_map = np.zeros(offset - 1 + len(labels), dtype=np.intp)