flow-stat overall-summary incorrectly handles 100% results in one bucket

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What steps will reproduce the problem?
1. run flow-stat on flow capture files that all hit one bucket in the summary.  
For example, all packets are size 128.


What is the expected output? What do you see instead?
Should see 100% under 128 in IP packet size distribution.  Instead, .000 is 
displayed.

What version of the product are you using? On what operating system?
flow-tools-0.68.5.1, linux

Please provide any additional information below.
###the following has 12 packets, 10 with 106 bytes and 2 with 234 octets and 
flow-stat -f0 correctly shows 'IP packet size distribution" percentage's.
[jwacase@nickel flow-tools]$ flow-print < ft-v05.2012-03-07.121228-0700  
srcIP            dstIP            prot  srcPort  dstPort  octets      packets
10.156.1.2       10.156.8.202     6     42499    307      234         1         
10.156.1.2       10.156.8.202     6     273      42528    106         1         
10.156.1.2       10.156.8.202     6     546      547      106         1         
10.156.1.2       10.156.8.202     6     23879    54468    106         1         
10.156.1.2       10.156.8.202     6     34133    48553    106         1         
10.156.1.2       10.156.8.202     6     613      614      234         1         
10.156.1.2       10.156.8.202     6     35218    27234    106         1         
10.156.1.2       10.156.8.202     6     26011    63973    106         1         
10.156.1.2       10.156.8.202     6     42937    21264    106         1         
10.156.1.2       10.156.8.202     6     17609    13617    106         1         
10.156.1.2       10.156.8.202     6     62701    43400    106         1         
10.156.1.2       10.156.8.202     6     5628     23491    106         1    
jwacase@nickel flow-tools]$ flow-stat < ft-v05.2012-03-07.121228-0700 | grep -A 
2 "IP packet size distribution"
IP packet size distribution:
   1-32   64   96  128  160  192  224  256  288  320  352  384  416  448  480
   .000 .000 .000 .833 .000 .000 .000 .167 .000 .000 .000 .000 .000 .000 .000 

### the following has all flows as one size. and flow-stat -f0 is all 000's.. 
assume it is truncating to 3 decimal digits and losing the 1.
[jwacase@nickel flow-tools]$ flow-print < ft-v05.2012-03-07.121727-0700srcIP    
        dstIP            prot  srcPort  dstPort  octets      packets
10.156.1.2       10.156.8.202     6     273      42528    106         1         
10.156.1.2       10.156.8.202     6     546      547      106         1         
10.156.1.2       10.156.8.202     6     23879    54468    106         1         
10.156.1.2       10.156.8.202     6     34133    48553    106         1         
10.156.1.2       10.156.8.202     6     35218    27234    106         1         
10.156.1.2       10.156.8.202     6     26011    63973    106         1         
10.156.1.2       10.156.8.202     6     42937    21264    106         1         
10.156.1.2       10.156.8.202     6     17609    13617    106         1         
10.156.1.2       10.156.8.202     6     62701    43400    106         1         
10.156.1.2       10.156.8.202     6     5628     23491    106         1         
10.156.1.2       10.156.8.202     6     2814     35536    106         1         
[jwacase@nickel flow-tools]$ flow-stat < ft-v05.2012-03-07.121727-0700 | grep 
-A 2 "IP packet size distribution"
IP packet size distribution:
   1-32   64   96  128  160  192  224  256  288  320  352  384  416  448  480
   .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 

### modifying ( a poor hack ) function print_3float lib/support.c to 
void print_3float(float f)
{
  printf("%#4.2f " , f);

/*  char s[10], *c;
  sprintf(s, "%-8.4f", f);
  sprintf(s, "%#0-5.3", f);
  c = s + 1;
  printf("%s ", f);
*/
} /* print_3float */

# gives the following, which alters the output to be d.dd versus .ddd, and thus 
shows the 100% case
[jwacase@fsa flow-tools-0.68.5.1]$ ./src/flow-stat < 
ft-v05.2012-03-07.121727-0700 | grep -A 2 "IP packet size distribution"
IP packet size distribution:
   1-32   64   96  128  160  192  224  256  288  320  352  384  416  448  480
   0.00 0.00 0.00 1.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 

Original issue reported on code.google.com by [email protected] on 7 Mar 2012 at 10:35