bind: fix C99-ism
bind: fix C99-ism

Change-Id: I37a13cbea00303fb16a50a9d8479c74a982e6c5c

lifei/gopy,lifei/gopy,kellrott/gopy,ericsnowcurrently/gopython-gopy,ericsnowcurrently/gopython-gopy,go-python/gopy,go-python/gopy-gen,kellrott/gopy,go-python/gopy,go-python/gopy-gen