Replace expectedResultCount with counting running jobs.

expectedResultCount was wrong as soon one run of walk results in several additionas to jobQueue.
Counting the running jobs is more robust and also easier to understand.

pkg/walker/walker.go

@@ -36,25 +36,27 @@ func Run(jobs []WalkJob, par int, bufferSize int, verbose int) []string {
 	results := make(chan []string, bufferSize)
 	jobQueue := make(chan WalkJob, bufferSize)
 	spawn := make(chan WalkJob, bufferSize)
+	runningJobCount := 0
 
 	for i, job := range jobs {
 		if (i + 1) <= par {
+			runningJobCount += 1
 			spawn <- job
 		} else {
 			jobQueue <- job
 		}
 	}
 
 	globalResult := []string{}
-	expectedResultCount := initialJobCount
 	maxId := 0
-	for expectedResultCount > 0 {
+	for runningJobCount > 0 {
 		select {
 		case singleResult := <-results:
 			globalResult = append(globalResult, singleResult...)
-			expectedResultCount -= 1
+			runningJobCount -= 1
 			if len(jobQueue) > 0 {
 				// check then act is safe since only this one thread received from jobQueue
+				runningJobCount += 1
 				spawn <- <-jobQueue
 			}
 		case j := <-spawn: