[compiler] miscellaneous trivial compiler warning fixes

2006-01-19 Paul Jakma <paul.jakma@sun.com>

        * (general) various miscellaneous compiler warning fixes.
          Remove redundant break statements from switch clauses
          which return.
          return from main, not exit, cause it annoys SOS.
          Remove stray semi-colons which cause empty-statement
          warnings.
	* zebra/main.c: (sighup) remove private declaration of external
	  function.
diff --git a/ripngd/ripng_main.c b/ripngd/ripng_main.c
index 5885f47..e6276c1 100644
--- a/ripngd/ripng_main.c
+++ b/ripngd/ripng_main.c
@@ -299,5 +299,5 @@
     thread_call (&thread);
 
   /* Not reached. */
-  exit (0);
+  return 0;
 }