Re: 5.3.1 build warning

[Roberto Ierusalimschy <roberto@...>]

> When building Lua 5.3.1 on OS X with LLVM, I get the following warning:
> 
> lua/src/lvm.c:1128:58: warning: implicit conversion loses integer
> precision: 'long' to 'int' [-Wshorten-64-to-32]
> 
>         b = luaD_poscall(L, ra, (b != 0 ? b - 1 : L->top - ra));
> 
>             ~~~~~~~~~~~~                          ~~~~~~~^~~~
> 
> This should be trivially fixable by casting L->top - ra to int.
> 
> IMHO this is worth doing because it's being implicitly converted anyway,
> and it's the only warning produced by the build :)

It is funny that this compiler flags only this one. If I use
-Wconversion in my platform, I get 226 warnings similar to this one.

-- Roberto