virfile: Resolve Coverity DEADCODE
Adjust the parentheses in/for the waitpid loops; otherwise, Coverity
points out:
(1) Event assignment: Assigning: "waitret" = "waitpid(pid, &status, 0) == -1"
(2) Event between: At condition "waitret == -1", the value of "waitret"
must be between 0 and 1.
(3) Event dead_error_condition: The condition "waitret == -1" cannot
be true.
(4) Event dead_error_begin: Execution cannot reach this statement:
"ret = -*__errno_location();".
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
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