port last fix also to netdata

ChangeLog

@@ -8,7 +8,7 @@ UNRELEASED
   * (bugfix)  Fix issue compliling on RHEL/Centos 7 (#95, @jbackman)
   * (bugfix) Lower -i limit to 1 instead of 10
   * (bugfix) Improve interval preciseness of -Q reporting
-  * (bugfix) Fix occasional false positive in interval reporting (#97)
+  * (bugfix) Fix occasional false positive in -Q reporting (#97)
 
 2015-10-21  David Schweikert  <david@schweikert.ch>
   * Version 3.13

src/fping.c

@@ -1323,8 +1323,12 @@ void print_netdata( void )
         }
 
         /* if we just sent the probe and didn't receive a reply, we shouldn't count it */
+        h->discard_next_recv_i=0;
         if( h->waiting && timeval_diff(&current_time, &h->last_send_time) < h->timeout) {
-            if(h->num_sent_i) h->num_sent_i--;
+            if(h->num_sent_i) {
+                h->num_sent_i--;
+                h->discard_next_recv_i=1;
+            }
         }