fix missing import in test_blas.py

theano/tensor/tests/test_blas.py

@@ -4,7 +4,7 @@ from theano.gof import Env
 from theano.printing import pp
 import numpy
 from theano.tensor.blas import *
-from theano.tensor.blas import _dot22, res_is_a
+from theano.tensor.blas import _dot22, res_is_a, _as_scalar, _is_real_matrix
 from unittest import TestCase
 from theano.tests import unittest_tools
 from copy import copy