bug in ftoastr example

[Ben Pfaff]

The example in lib/ftoastr.h is:

     int r = dtoastr (buf, sizeof buf, "%*.*g", 0, 0.1);

but the prototype for dtoastr() is:

int  dtoastr (char *buf, size_t bufsize, int flags, int width,      double x);

So "%.*g" in the example is wrong: it needs to get replaced by a
"flags" argument.

Thanks,

Ben.
-- 
Ben Pfaff 
http://benpfaff.org