webservices: allocate enough memory for WS_XML_TEXT_TYPE_DOUBLE (Valgrind) (try 2)

[Henri Verbeet]

On 13 December 2016 at 20:17, Austin English <austinenglish at gmail.com> wrote:
> +        /* buf was originally [24], increased to 48 to prevent a stack smashing error when running tests under Valgrind */
> +        unsigned char buf[48]; /* "-1.1111111111111111E-308". */
The more interesting comment would perhaps be what actually happens
and why this helps.

One thing I do notice is that while 24 chars would be enough to hold
"-1.1111111111111111E-308", that doesn't leave any room for the \0
terminator, while the other cases above this one do seem to include
space for that.