port-probe: store the task always before completing it

If we already got all needed probing results, we complete the task without
launching any new probing, but still, we need to store it internally so
that it's properly disposed.

src/mm-port-probe.c

@@ -736,6 +736,10 @@ mm_port_probe_run (MMPortProbe *self,
         }
     }
 
+    /* Store as current task. We need to keep it internally, as it will be
+     * freed during _finish() when the operation is completed. */
+    self->priv->task = task;
+
     /* All requested probings already available? If so, we're done */
     if (!task->flags) {
         port_probe_run_task_complete (task, TRUE, NULL);
@@ -745,9 +749,6 @@ mm_port_probe_run (MMPortProbe *self,
     /* Setup internal cancellable */
     task->cancellable = g_cancellable_new ();
 
-    /* Store as current task */
-    self->priv->task = task;
-
     /* If any AT-specific probing requested, require generic AT check before */
     if (task->flags & (MM_PORT_PROBE_AT_VENDOR |
                        MM_PORT_PROBE_AT_PRODUCT)) {