Fix some warnings when we don't have sockets or syslog

This commit was SVN r27973.

opal/util/if.c

@@ -784,7 +784,7 @@ opal_ifislocal(const char *hostname)
 }
 
 int
-opal_iftupletoaddr(char *inaddr, uint32_t *net, uint32_t *mask)
+opal_iftupletoaddr(const char *inaddr, uint32_t *net, uint32_t *mask)
 {
     return 0;
 }

opal/util/output.c

@@ -113,7 +113,9 @@ static output_desc_t info[OPAL_OUTPUT_MAX_STREAMS];
 static char *temp_str = 0;
 static size_t temp_str_len = 0;
 static opal_mutex_t mutex;
+#if defined(HAVE_SYSLOG)
 static bool syslog_opened = false;
+#endif
 static char *redirect_syslog_ident = NULL;
 
 OBJ_CLASS_INSTANCE(opal_output_stream_t, opal_object_t, construct, NULL);