fix compiler warning about use of uninitialized structure

* added initialization of precision ( 0 => use sass default precision )
Yes, but there is some discussion about changing it to 10.

By initializing it to 0 (as was being done, just implicitly) will cause
precision to pickup the sass default even if it changes in the future.
On Jun 22, 2014 8:14 PM, "Nick Schonning" <notifications@github.com> wrote:

> In emscripten_wrapper.cpp:
>
> > @@ -18,6 +18,7 @@ char *sass_compile_emscripten(
> >    options.output_style = output_style;
> >    options.image_path = NULL;
> >    options.include_paths = include_paths;
> > +  options.precision = 0; // 0 => use sass default numeric precision
>
> Default is actually 5,
> https://github.com/sass/sass/blob/2045a314e2fcd2a5f32d358a4ba57409089e6372/lib/sass/script/value/number.rb#L37
>
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> <https://github.com/sass/libsass/pull/416/files#r14058252>.
>