Avoid compiler warning about empty bodies

Make empty bodies of control flow statements more explicit.  Doing so
will allow us to use stricter compiler settings.  This would have
cought 4ece292c.

* console-client/xkb/xkb.c: Make empty bodies more explicit
* libpipe/pipe.c: Likewise.
* mach-defpager/default_pager.c: Likewise.
* pfinet/linux-src/net/ipv4/fib_hash.c: Likewise.
* pflocal/connq.c: Likewise.
* pflocal/socket.c: Likewise.

6 files changed, 12 insertions, 7 deletions

diff --git a/console-client/xkb/xkb.c b/console-client/xkb/xkb.c
index 0b439134..0039714b 100644
--- a/console-client/xkb/xkb.c
+++ b/console-client/xkb/xkb.c
@@ -606,10 +606,11 @@ clearcontrols (keypress_t key, boolctrls ctrls, int flags)
 static void
 lockcontrols (keypress_t key, boolctrls ctrls, int flags)
 {
+  /* XXX this needs a closer look.  */
   if (!key.rel)
     {
       //setcontrols (key, boolctrls, flags);
-      if (!(flags & noLock));
+      //if (!(flags & noLock))
       //	lboolctrls |= boolctrls;
     }
   else
diff --git a/libpipe/pipe.c b/libpipe/pipe.c
index 1080b5d5..f9300e7c 100644
--- a/libpipe/pipe.c
+++ b/libpipe/pipe.c
@@ -352,7 +352,9 @@ pipe_send (struct pipe *pipe, int noblock, void *source,
 	  if (!err)
 	    err = packet_set_ports (control_packet, ports, num_ports);
 	  if (err)
-	    /* Trash CONTROL_PACKET somehow XXX */;
+	    {
+	      /* Trash CONTROL_PACKET somehow XXX */
+	    }
 	}
     }
 
diff --git a/mach-defpager/default_pager.c b/mach-defpager/default_pager.c
index f514ea6b..380c7246 100644
--- a/mach-defpager/default_pager.c
+++ b/mach-defpager/default_pager.c
@@ -88,13 +88,13 @@ synchronized_printf (const char *fmt, ...)
 #if 0
 #define dprintf(f, x...)	synchronized_printf (f, ##x)
 #else
-#define dprintf(f, x...)
+#define dprintf(f, x...)	(void) 0
 #endif
 
 #if 0
 #define ddprintf(f, x...)	synchronized_printf (f, ##x)
 #else
-#define ddprintf(f, x...)
+#define ddprintf(f, x...)	(void) 0
 #endif
 
 /*
diff --git a/pfinet/linux-src/net/ipv4/fib_hash.c b/pfinet/linux-src/net/ipv4/fib_hash.c
index d9e029ce..e3987eac 100644
--- a/pfinet/linux-src/net/ipv4/fib_hash.c
+++ b/pfinet/linux-src/net/ipv4/fib_hash.c
@@ -406,7 +406,7 @@ static void rtmsg_fib(int, struct fib_node*, int, int,
 		      struct nlmsghdr *n,
 		      struct netlink_skb_parms *);
 #else
-#define rtmsg_fib(a, b, c, d, e, f)
+#define rtmsg_fib(a, b, c, d, e, f)	(void) 0
 #endif
 
 
diff --git a/pflocal/connq.c b/pflocal/connq.c
index d88711e3..d86f9a24 100644
--- a/pflocal/connq.c
+++ b/pflocal/connq.c
@@ -212,7 +212,7 @@ connq_listen (struct connq *cq, struct timespec *tsp, struct sock **sock)
        request and another listener (should) eventually come along.
        (In fact it is very probably as the caller has likely done a
        select and will now follow up with an accept.)  */
-    ;
+    { /* Do nothing.  */ }
 
  out:
   pthread_mutex_unlock (&cq->lock);
diff --git a/pflocal/socket.c b/pflocal/socket.c
index 7142c6ef..792c6379 100644
--- a/pflocal/socket.c
+++ b/pflocal/socket.c
@@ -198,7 +198,9 @@ S_socket_accept (struct sock_user *user,
 	      ports_port_deref (peer_addr);
 	    }
 	  else
-	    /* TEAR DOWN THE CONNECTION XXX */;
+	    {
+	      /* TEAR DOWN THE CONNECTION XXX */
+	    }
 	}
     }