fixed empty .pcap file bug

qstream

@@ -1299,13 +1299,15 @@ sub xml_dump {
     	$packets_dupXML->addText(&format_numbers($dup{$f}));
 		$packets_lateXML->addText(&format_numbers($late{$f}));
 		$packets_lostXML->addText(&format_numbers($nloss{$f}));
-		my $n=$npkt{$f}; $n=1 if $npkt{$f} <1; # divide by zero protection
+		my $n=$npkt{$f}; $n=1 if $npkt{$f} < 1; # divide by zero protection
+		my $njitter = $njitter{$f}; $njitter =1 if $njitter{$f} < 1;
 		$packets_sizeXML->addText(&format_numbers($sumbyte{$f}/$n));
 		
 	    #adds values
 	    $MOS_XML->addText(&format_numbers(&mos_r($codec, $rtt,  avg( $sumgap{$f}, $ngap{$f}) / 1000,
-					avg($sumjitter{$f}, $njitter{$f})/1000, 
-					100*$nloss{$f}/$npkt{$f})));	
+					avg($sumjitter{$f}, $njitter)/1000, 
+					100*$nloss{$f}/$n)));
+					
 	    $rtp_timestamp->addText(&format_numbers($ntimeerr{$f}));
 	    $rtp_dup->addText(&format_numbers($dup{$f}));
 	    $rtp_late->addText(&format_numbers($late{$f}));
@@ -1314,8 +1316,8 @@ sub xml_dump {
 	    $rtp_avg->addText(&format_numbers( avg( $sumloss{$f}, $nloss{$f}) ));
 	    $rtp_sdv->addText(&format_numbers( sdv($lost{$f}, $sumloss{$f},$ssumloss{$f})));
 	    $rtp_jitter_numb->addText(&format_numbers($njitter{$f}));			
-	    $rtp_jitter_avgXML->addText(&format_numbers($sumjitter{$f}/$njitter{$f}/1000));
-	    $rtp_jitter_sdvXML->addText(&format_numbers($sumjitter{$f}/$njitter{$f}/1000));
+	    $rtp_jitter_avgXML->addText(&format_numbers($sumjitter{$f}/$njitter/1000));
+	    $rtp_jitter_sdvXML->addText(&format_numbers($sumjitter{$f}/$njitter/1000));
 	    $rtp_jitter_minXML->addText(&format_numbers($minjitter{$f}/1000));
 	    $rtp_jitter_maxXML->addText(&format_numbers($maxjitter{$f}/1000));
 	    $rtp_jitter_rfc->addText(&format_numbers($maxjitter{$f}/1000));
@@ -1743,6 +1745,8 @@ sub print_out {
 			my $id=$f;
 			my $source=$f; 
 			next if $npkt{$f} < $opt_flow_min;
+			my $n=$npkt{$f}; $n=1 if $npkt{$f} < 1; # divide by zero protection
+			my $njitter = $njitter{$f}; $njitter =1 if $njitter{$f} < 1;
 			$source=$source{$f} if  ! $opt_v && $source{$f} ne "" && !$file_flag;
 			$source=$opt_id if $opt_id;
 			my $jitter_stat= $opt_rtp || $opt_crude;
@@ -1778,10 +1782,11 @@ sub print_out {
 			}
 			my @output = (@dwell_head);
 			my $mos;
+			print "$npkt{$f} \n";
 				if ($jitter_stat){
 				    $mos=&mos_r($codec, $rtt,  avg( $sumgap{$f}, $ngap{$f}) / 1000,
-							avg($sumjitter{$f}, $njitter{$f})/1000, 
-							100*$nloss{$f}/$npkt{$f} );
+							avg($sumjitter{$f}, $njitter)/1000, 
+							100*$nloss{$f}/$n );
 				}
 			if ($opt_v) {
 			    #Prints header
@@ -1991,7 +1996,7 @@ sub print_out {
 				my $n=$npkt{$f}; $n=1 if $npkt{$f} <1; # divide by zero protection
 		
 				if ($jitter_stat){
-				    @jitterstat= (&lesbars($sumjitter{$f}/$njitter{$f}/1000),
+				    @jitterstat= (&lesbars($sumjitter{$f}/$njitter/1000),
 						  &lesbars(sdv($njitter{$f}, $sumjitter{$f}, $ssjitter{$f})/1000),
 						  &lesbars($minjitter{$f}/1000), 
 						  &lesbars($maxjitter{$f}/1000));