granubuf~: attribute notification

[equilet]

I found that the undocumented [buffer] message to [granubuf~] seems to alter the [setbuffer] attribute, but that the attribute notification is not linked properly somehow.

You can test with this patch:

----------begin_max5_patcher----------
474.3ocyUFsSBCCEF95smhkFubZ1VAFyWEigTfCyRFcKscHDi9ra6oaHnvxD
mFuokd5o8z+O9W6K9dj4k6.EI39fGB77dw2yCCYC30L1irgsaQASgoQDvyky
WSBcSogcZL775Uq.4aAl9j1IU58E.NaaDQ8Ftn.z3VE+QvxZcazjlntP58Uf
6zQVUTxzjPSoXhbRviM4UwzKdhKxmIgEZWpzrn6hBCnzDaW5Xaah42GVCeId
pL5313DhM1q991lvACBw+WfPTTOfP70.AlVKq4WVm14msjqpJX6+jT+p9sIi
qVAZGFImkLs4WIAEHzLMuTbjpGMNFk6DaaTSyAI+Eb1IAOYuhc37hDL5ZH3F
PoX4v47Q80+jbMThlNE0DMZ.vzoaFcTWXZ5.SojeSJMZR7vQoS2rtoT1.SIy
GSA2LLFpuo0HyI5L2EwcJ5zA7d3bISTaD9a+nKgunlU7bAqnOJOgRscS571W
5wJGSfTvEe9UYrH13mhCUYsbQ6Aq4lHiO8PcVBJMWfV6iRh5x4rDuuEJqG0I
c.pyz+n5jdUby8+EqpZKHUMIikvXTWWhOokFhC4B2PJNTBa4s4OFivjFSj13
fpkNq5toSHtkVtDjBySsVSousxu5+NfFS5i.
-----------end_max5_patcher-----------