vmstat: Fix conversion errors due to precision issues in function unitConvert

For exmaple unitConvert (98720620) will return 98720624, not 98720620.

Because we do (unsigned long)(float)98720620 in function unitConvert
and this is wrong! We should do (unsigned long)(double)98720620 here.
1 job for fix-unitConvert-issue in 1 minute and 41 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #92227837
MakeCheck

00:01:41