json - Remove call to sscanf().
The call to sscanf() was adding about 2kB of code.  Replace this with a
call to strtoul().
@@ -344,7 +344,7 @@ json_internal_read_object(struct json_buffer *jb,
}
// Scroll back one
c = jb->jb_read_prev(jb);
- (void)sscanf(uescape, "%04x", &u);
+ u = strtoul(uescape, NULL, 16);
*pval++ = (char)u; /* will truncate values above 0xff */
break;
default: /* handles double quote and solidus */
