Bug 700938: Fix stack overflow in numtostr as used by Number#toFixed().

32 is not enough to fit sprintf("%.20f", 1e20).
We need at least 43 bytes to fit that format.
Bump the static buffer size.
static void jsB_Number(js_State *J)
{
	js_pushnumber(J, js_gettop(J) > 1 ? js_tonumber(J, 1) : 0);
}

static void jsB_Number(js_State *J)
{
	js_pushnumber(J, js_gettop(J) > 1 ? js_tonumber(J, 1) : 0);
}
