fix bug cache version format

theano/scalar/basic.py

@@ -1557,7 +1557,7 @@ class AND(BinaryBitOp):
         return "%(z)s = (%(x)s & %(y)s);" % locals()
 
     def c_code_cache_version(self):
-        return (2.1,)
+        return (2,1,)
 and_ = AND()