macro substitution in init()

[ethers]

Serpent develop 2b11341, pyethereum develop b7a551c

def init():
    # log(1)
    m_foo()
    # log(5)

macro m_foo():
    log(33333)

def bar():
    return(9)

EXPECTED: 3333 is logged
OBSERVED: nothing is logged. if either line is uncommented in init(), then 3333 is also logged