action: Get rid of ERROR statements in child process in file() test

ERROR() since commit 738570df60f65c10cd7fde4134f3af1e005b671a calls
progressbar_error() to synchronise with the progress bar output,
however, this function uses pthread mutexes which are meaningless/
useless in a child process.

Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
1 file changed
tree: 6711d78d874129a14cc0e2c553023d0e73b60aa0
  1. kernel/
  2. kernel-2.4/
  3. squashfs-tools/
  4. README