Addressed 3 Coverity Scan issues:
  (1) task.c: initialize the "curr" and "curr_my_q" variables in the
      dump_tasks_in_task_group_cfs_rq() function.
  (2) ramdump.c: make the "rd" and "len" return values from read()
      and write() calls in write_elf() to be ssize_t types.
  (3) cmdline.c: make the parsed PATH string buffer equal to the size
      of the PATH string + 1 to prevent a possible buffer overflow
      when a command line starts with a "!".
(anderson@redhat.com)