job: Replace BlockJob.completed with job_is_completed()

Since we introduced an explicit status to block job, BlockJob.completed
is redundant because it can be derived from the status. Remove the field
from BlockJob and add a function to derive it from the status at the Job
level.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

job.c

@@ -121,6 +121,28 @@ bool job_is_cancelled(Job *job)
     return job->cancelled;
 }
 
+bool job_is_completed(Job *job)
+{
+    switch (job->status) {
+    case JOB_STATUS_UNDEFINED:
+    case JOB_STATUS_CREATED:
+    case JOB_STATUS_RUNNING:
+    case JOB_STATUS_PAUSED:
+    case JOB_STATUS_READY:
+    case JOB_STATUS_STANDBY:
+        return false;
+    case JOB_STATUS_WAITING:
+    case JOB_STATUS_PENDING:
+    case JOB_STATUS_ABORTING:
+    case JOB_STATUS_CONCLUDED:
+    case JOB_STATUS_NULL:
+        return true;
+    default:
+        g_assert_not_reached();
+    }
+    return false;
+}
+
 bool job_started(Job *job)
 {
     return job->co;