fix negated return value of ns_skiprr, breakage in related functions

due to a reversed pointer difference computation, ns_skiprr always
returned a negative value, which functions using it would interpret as
an error.

patch by Yu Lu.

diff --git a/src/network/ns_parse.c b/src/network/ns_parse.c
index 3ff33a8..d01da47 100644 (file)
--- a/src/network/ns_parse.c
+++ b/src/network/ns_parse.c
@@ -95,7 +95,7 @@ int ns_skiprr(const unsigned char *ptr, const unsigned char *eom, ns_sect sectio
                        p += r;
                }
        }
-       return ptr - p;
+       return p - ptr;
 bad:
        errno = EMSGSIZE;
        return -1;