Ensure kern_shape has dtype attribute.

Author: notoraptor

theano/gpuarray/dnn.py

@@ -385,6 +385,7 @@ def __init__(self, border_mode, subsample=(1, 1), conv_mode='conv',
         self.precision = precision
 
     def make_node(self, kern_shape):
+        kern_shape = as_tensor_variable(kern_shape)
         if kern_shape.type.ndim != 1 or kern_shape.dtype not in theano.tensor.basic.int_dtypes:
             raise TypeError('kern must be an int64 1D shape tensor')
         kern_shape = theano.tensor.basic.cast(kern_shape, 'int64')