[HLSCustomOp] Fix LabelSelect_Batch compatible op data type

src/finn/custom_op/fpgadataflow/labelselect_batch.py

@@ -99,16 +99,16 @@ class LabelSelect_Batch(HLSCustomOp):
         ishape = tuple(model.get_tensor_shape(self.onnx_node.input[0]))
         assert ishape == exp_ishape, "Unexpected input shape."
         # implement tensor with correct shape
-        values = np.random.randn(*oshape).astype(np.float32)
+        values = np.random.randn(*oshape).astype(np.int64)
         return helper.make_node(
             "Constant",
             inputs=[],
             outputs=[self.onnx_node.output[0]],
             value=helper.make_tensor(
                 name="const_tensor",
-                data_type=TensorProto.FLOAT,
+                data_type=TensorProto.INT64,
                 dims=values.shape,
-                vals=values.flatten().astype(float),
+                vals=values.flatten(),
             ),
         )