Add unneccessary to Operator.imag

In order to make sure that the jacobian test can deal with complex positions

nifty6/extra.py

@@ -219,7 +219,7 @@ def consistency_check(op, domain_dtype=np.float64, target_dtype=np.float64,
 def _get_acceptable_location(op, loc, lin):
     if not np.isfinite(lin.val.s_sum()):
         raise ValueError('Initial value must be finite')
-    dir = from_random(loc.domain, "normal")
+    dir = from_random(loc.domain, dtype=loc.dtype)
     dirder = lin.jac(dir)
     if dirder.norm() == 0:
         dir = dir * (lin.val.norm()*1e-5)

test/test_operators/test_adjoint.py

@@ -80,6 +80,8 @@ def testImaginizer(sp):
     op = ift.Imaginizer(sp)
     ift.extra.consistency_check(op, np.complex128, np.float64,
                                 only_r_linear=True)
+    loc = ift.from_random(op.domain, dtype=np.complex128)
+    ift.extra.check_jacobian_consistency(op, loc)
 
 
 @pmp('sp', _h_spaces + _p_spaces + _pow_spaces)