Fixed syntax error.

theano/tensor/var.py

@@ -574,7 +574,7 @@ class _tensor_py_operators:
 class TensorVariable(_tensor_py_operators, Variable):
     """Subclass to add the tensor operators to the basic `Variable` class."""
 
-    def __init__(self, type)
+    def __init__(self, type):
         if (config.warn_float64 and type = float64):
             print '''Warning, you are instanciating parts of your graph 
                 with the float64 type (possibly by accident).