fix: Print the ascii progress bar only if total jobs is a positive integer

Co-authored-by: Dennis Klein <dennis.klein.github@gmail.com>

Author: Apfelholz

ptop.py

@@ -62,7 +62,8 @@ def ascii_progress_bar(percentage, total_jobs, bar_length=50):
                 lines.extend(new_lines)
 
             clear_console()
-            print(ascii_progress_bar(progress(lines, tj),tj))
+            if total_jobs > 0:
+                print(ascii_progress_bar(progress(lines, tj)))
 
             print(
                 "--------------------------------------------------------------"