make CudaNdarray_set_device_data const input(was needed by a previous/following commit)

theano/sandbox/cuda/cuda_ndarray.cu

@@ -4107,7 +4107,7 @@ int CudaNdarray_set_nd(CudaNdarray * self, const int nd)
     return 0;
 }
 
-int CudaNdarray_set_device_data(CudaNdarray * self, float * data, CudaNdarray * base)
+int CudaNdarray_set_device_data(CudaNdarray * self, float * data, const CudaNdarray * base)
 {
     return CudaNdarray_set_device_data(self, data, (PyObject *) base);
 }

theano/sandbox/cuda/cuda_ndarray.cuh

@@ -282,7 +282,7 @@ static PyObject *CudaNdarray_NewDims(int nd, const inttype * dims)
  * Set self to be a view of given `data`, owned by existing CudaNdarray `base`.
  */
 DllExport int CudaNdarray_set_device_data(CudaNdarray * self, float * data, PyObject * base);
-DllExport int CudaNdarray_set_device_data(CudaNdarray * self, float * data, CudaNdarray * base);
+DllExport int CudaNdarray_set_device_data(CudaNdarray * self, float * data, const CudaNdarray * base);
 
 /**
  * Return an independent copy of self