BUG/MINOR: peers: Do not ignore a protocol error for dictionary entries.

If we could not decode the ID of a dictionary entry from a peer update message,
we must inform the remote peer about such an error as this is done for
any other decoding error.

(cherry picked from commit f9e51beec118f1bbd558ed689fdad35046160529)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/src/peers.c b/src/peers.c
index aac015a..53c3c73 100644
--- a/src/peers.c
+++ b/src/peers.c
@@ -1506,8 +1506,9 @@
 			dc = p->dcache;
 			if (*msg_cur == end) {
 				/* Dictionary entry key without value. */
-				if (id > dc->max_entries)
-					break;
+				if (id > dc->max_entries) {
+					goto malformed_unlock;
+				}
 				/* IDs sent over the network are numbered from 1. */
 				de = dc->rx[id - 1].de;
 			}