slirp: Fix unusual "comments" in unused code

cppcheck detected two rather strange comments which were not
correctly written as C comments.

They did not cause any harm because they were framed by
#ifdef notdef ... #endif, so they were never compiled.

Fix them nevertheless (we could also remove the unused code).

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>

slirp/ip_input.c

@@ -554,7 +554,7 @@ typedef uint32_t n_time;
 			/*
 			 * If no space remains, ignore.
 			 */
-			off--;			 * 0 origin *
+                        off--; /* 0 origin */
 			if (off > optlen - sizeof(struct in_addr))
 				break;
 			bcopy((caddr_t)(&ip->ip_dst), (caddr_t)&ipaddr.sin_addr,