Callback arguments not added as dataflow

[tbennun]

The following program does not work:

@dace
def tester(A: dace.float64[20]):
    print(np.sum(A))

But this one does:

@dace
def tester(A: dace.float64[20]):
    b = np.sum(A)
    print(b)

Seems to be a simple issue with arguments in create_callback.