parse_content_length: be strict and prevent UB - hurl - Gopher/HTTP/HTTPS file grabber
  HTML git clone git://git.codemadness.org/hurl
   DIR Log
   DIR Files
   DIR Refs
   DIR README
   DIR LICENSE
       ---
   DIR commit dc438c84e129c666039277f3cd8eb9788dec93e5
   DIR parent 85d6ee233ea16724799840840cb19c955cc0842f
  HTML Author: Hiltjo Posthuma <hiltjo@codemadness.org>
       Date:   Mon,  9 Aug 2021 18:56:59 +0200
       
       parse_content_length: be strict and prevent UB
       
       Diffstat:
         M hurl.c                              |       2 +-
       
       1 file changed, 1 insertion(+), 1 deletion(-)
       ---
   DIR diff --git a/hurl.c b/hurl.c
       @@ -76,7 +76,7 @@ parse_content_length(const char *s, size_t *length)
                p += sizeof("\r\nContent-Length:") - 1;
                p += strspn(p, " \t");
        
       -        if (!isdigit(*p))
       +        if (!isdigit((unsigned char)*p))
                        return -1;
        
                errno = 0;