mod_websocket: Avoid floating point division
mod_websocket: Avoid floating point division

The problem here was that Lua's integer conversion (rounding?) routines
behave differently on x86 vs. x86_64 (and even on those there can be
minor differenes). Usually the former does proper rounding,
while the later floors.

Contatta/prosody-modules,Contatta/prosody-modules,Contatta/prosody-modules,Contatta/prosody-modules,Contatta/prosody-modules