swap plugin: Don't report an error if there is no swap space on Linux.

… rather, simply record zeros in that case. Swap may be switched on and off at
arbitrary times and/or might be added at "later" times. Thus, storing zero in
case the swap plugin is enabled sounds like the best approach to me.

diff --git a/src/swap.c b/src/swap.c
index 629d1a1..30daa4b 100644 (file)
--- a/src/swap.c
+++ b/src/swap.c
@@ -239,7 +239,7 @@ static int swap_read (void) /* {{{ */
                                sstrerror (errno, errbuf, sizeof (errbuf)));
        }
 
-       if ((swap_total == 0LL) || ((swap_free + swap_cached) > swap_total))
+       if ((swap_free + swap_cached) > swap_total)
                return (-1);
 
        swap_used = swap_total - (swap_free + swap_cached);