In RepeatOp, fix detection of numpy-supported dtypes

theano/tensor/extra_ops.py

@@ -246,17 +246,17 @@ class RepeatOp(theano.Op):
         # Some dtypes are not supported by numpy's implementation of repeat.
         # Until another one is available, we should fail at graph construction
         # time, not wait for execution.
-        int_bitwidth = theano.gof.python_int_bitwidth()
-        if int_bitwidth == 64:
+        ptr_bitwidth = theano.gof.local_bitwidth()
+        if ptr_bitwidth == 64:
             numpy_unsupported_dtypes = ('uint64',)
-        if int_bitwidth == 32:
+        if ptr_bitwidth == 32:
             numpy_unsupported_dtypes = ('uint32', 'int64', 'uint64')
 
         if repeats.dtype in numpy_unsupported_dtypes:
             raise TypeError(
                     ("dtypes %s are not supported by numpy.repeat "
                      "for the 'repeats' parameter, "
-                     % numpy_unsupported_dtypes), repeats.dtype)
+                     % str(numpy_unsupported_dtypes)), repeats.dtype)
 
         if self.axis is None:
             broadcastable = [False]