Avoid division by zero.

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1664 f882894a-f735-0410-b71e-b25c423dba1c

diff --git a/plugins/check_ntp.c b/plugins/check_ntp.c
index 013c24bbbc9574d193695c75e48b4bdf124e75e1..861d0ba43eda140ea7111c1c39dedac13d8cad9e 100644 (file)
--- a/plugins/check_ntp.c
+++ b/plugins/check_ntp.c
@@ -608,7 +608,7 @@ double jitter_request(const char *host, int *status){
                }
        }
 
-       rval /= num_valid;
+       rval = num_valid ? rval / num_valid : -1.0;
 
        close(conn);
        free(peers);