lposix.c: fix whitespace typo.
lposix.c: fix whitespace typo.

rrthomas/luaposix,zevv/luaposix,zevv/luaposix,jimmyharris/luaposix,jimmyharris/luaposix,snegovick/luaposix,ardje/luaposix,ardje/luaposix,snegovick/luaposix,rrthomas/luaposix,luaposix/luaposix