`progress()` still depends on variable `tj`

[dennisklein]

exercise_gnu_parallel_top/ptop.py

Lines 41 to 42 in 0eb7d29

	def progress(lines, total_jops):
	return (len(lines) / tj) * 100 if tj else 0

The function progress() still uses the tj variable from the outer scope, but it should use the function argument total_jobs (also note the typo! p -> b).