job::repeat 0 causes infinite loop

[Rob Donnelly]

Given

#!/usr/bin/env jobrnr

job :test do
  execute 'echo'
  repeat 0
end

Expected

Terminates w/o running any jobs.

Actual

Loops endlessly with:

Running:0 Queued:0 Completed:0 Passed:0 Failed:0
Running:0 Queued:0 Completed:0 Passed:0 Failed:0
Running:0 Queued:0 Completed:0 Passed:0 Failed:0
Running:0 Queued:0 Completed:0 Passed:0 Failed:0
Running:0 Queued:0 Completed:0 Passed:0 Failed:0