slirp: remove dead increments, spotted by clang

Value stored is never read.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

3 files changed, 4 insertions, 2 deletions

diff --git a/bootp.c b/bootp.c
index fe8f495..70b6e9c 100644
--- a/bootp.c
+++ b/bootp.c
@@ -296,7 +296,7 @@ static void bootp_reply(Slirp *slirp, const struct bootp_t *bp)
         memcpy(q, nak_msg, sizeof(nak_msg) - 1);
         q += sizeof(nak_msg) - 1;
     }
-    *q++ =
+    *q =
 RFC1533_END
 ;
 
diff --git a/cksum.c b/cksum.c
index ca3eb2b..e5f8c11 100644
--- a/cksum.c
+++ b/cksum.c
@@ -73,7 +73,9 @@ int cksum(struct mbuf *m, int len)
 
     if (len < mlen)
         mlen = len;
+#ifdef DEBUG
     len -= mlen;
+#endif
     /*
      * Force to even boundary.
      */
diff --git a/tcp_subr.c b/tcp_subr.c
index a265b4c..9b10419 100644
--- a/tcp_subr.c
+++ b/tcp_subr.c
@@ -852,7 +852,7 @@ int tcp_emu(struct socket *so, struct mbuf *m)
                 if (p == 7071)
                     p = 0;
                 *(u_char *)bptr++ = (p >> 8) & 0xff;
-                *(u_char *)bptr++ = p & 0xff;
+                *(u_char *)bptr = p & 0xff;
                 ra = 0;
                 return 1; /* port redirected, we're done */
                 break;