small fixes

theano/compile/nanguardmode.py

@@ -106,7 +106,7 @@ def contains_nan(arr, node=None, var=None):
     """
     if not _is_numeric_value(arr, var):
         return False
-    elif "int" in getattr(arr, 'dtype', ''):
+    elif "int" in str(getattr(arr, 'dtype', '')):
         return False
     elif pygpu_available and isinstance(arr, GpuArray):
         return np.isnan(f_gpua_min(arr.reshape(arr.size)))

theano/compile/tests/test_nanguardmode.py

@@ -74,7 +74,7 @@ def test_NanGuardMode():
     x = T.matrix(dtype='uint8')
     w = theano.shared(np.random.randn(5, 7).astype(theano.config.floatX))
     y = T.dot(x, w)
-    a = (np.random.randn(3, 5).astype(theano.config.floatX)*10).astype('uint8')
+    a = (np.random.randn(3, 5).astype(theano.config.floatX) * 10).astype('uint8')
     fun = theano.function(
         [x], y,
         mode=NanGuardMode(nan_is_error=True, inf_is_error=True)