Fix endless loop when there are multiple DHCP options

src/lib/dhcp.c

@@ -714,7 +714,7 @@ int fr_dhcp_decode(RADIUS_PACKET *packet)
 			}
 
 			*tail = vp;
-			while (*tail) tail = &vp->next;
+			while (*tail) tail = &(*tail)->next;
 			p += alen;
 		} /* loop over array entries */
 	} /* loop over the entire packet */