g10: Fix --list-packets.

* g10/gpg.c (main): Call set_packet_list_mode after assignment of
opt.list_packets.
* g10/mainproc.c (do_proc_packets): Don't stop processing with
--list-packets as the comment says.
* g10/options.h (list_packets): Fix the comment.
* g10/parse-packet.c: Fix the condition for opt.list_packets.

--

(backport of master
commit 52f65281f9)

Debian-bug-id: 828109
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

g10/gpg.c

@@ -4130,7 +4130,6 @@ main (int argc, char **argv)
         break;
 
       case aListPackets:
-	opt.list_packets=2;
       default:
 	if( argc > 1 )
 	    wrong_args(_("[filename]"));
@@ -4157,8 +4156,8 @@ main (int argc, char **argv)
 		}
 	    }
 	    if( cmd == aListPackets ) {
-		set_packet_list_mode(1);
 		opt.list_packets=1;
+		set_packet_list_mode(1);
 	    }
 	    rc = proc_packets(NULL, a );
 	    if( rc )

g10/mainproc.c

@@ -1292,7 +1292,7 @@ do_proc_packets( CTX c, IOBUF a )
             /* stop processing when an invalid packet has been encountered
              * but don't do so when we are doing a --list-packets. */
 	    if (gpg_err_code (rc) == GPG_ERR_INV_PACKET
-                && opt.list_packets != 2 )
+                && opt.list_packets == 0 )
 		break;
 	    continue;
 	}

g10/options.h

@@ -62,7 +62,7 @@ struct
   int fingerprint; /* list fingerprints */
   int list_sigs;   /* list signatures */
   int no_armor;
-  int list_packets; /* list-packets mode: 1=normal, 2=invoked by command*/
+  int list_packets; /* Option --list-packets active.  */
   int def_cipher_algo;
   int force_v3_sigs;
   int force_v4_certs;

g10/parse-packet.c

@@ -207,7 +207,7 @@ set_packet_list_mode( int mode )
        whether using log_stream() would be better.  Perhaps we should
        enable the list mdoe only with a special option. */
     if (!listfp)
-        listfp = opt.list_packets == 2 ? stdout : stderr;
+        listfp = opt.list_packets ? stdout : stderr;
     return old;
 }