BUG: Fix IndexError: too many indices with numpy 1.8

Author: cgohlke

lib/matplotlib/tri/triinterpolate.py

@@ -1050,8 +1050,8 @@ def compute_dof_from_df(self):
         gradient.
         """
         J = CubicTriInterpolator._get_jacobian(self._tris_pts)
-        tri_z = self.z[self._triangles, :]
-        tri_dz = self.dz[self._triangles, :]
+        tri_z = self.z[self._triangles]
+        tri_dz = self.dz[self._triangles]
         tri_dof = self.get_dof_vec(tri_z, tri_dz, J)
         return tri_dof