tools/qvm-run: fix error reporting on qvm-run -n on halted qube

Fixes QubesOS/qubes-issues#4476

qubesadmin/tests/tools/qvm_run.py

@@ -479,7 +479,7 @@ class TC_00_qvm_run(qubesadmin.tests.QubesTestCase):
         ret = qubesadmin.tools.qvm_run.main(
             ['--no-gui', '--no-autostart', 'test-vm3', 'command'],
             app=self.app)
-        self.assertEqual(ret, 0)
+        self.assertEqual(ret, 1)
         self.assertEqual(self.app.service_calls, [])
         self.assertAllCalled()
 

qubesadmin/tools/qvm_run.py

@@ -207,6 +207,10 @@ def main(args=None, app=None):
         procs = []
         for vm in domains:
             if not args.autostart and not vm.is_running():
+                if verbose > 0:
+                    print_no_color('Qube \'{}\' not started'.format(vm.name),
+                        file=sys.stderr, color=args.color_stderr)
+                retcode = max(retcode, 1)
                 continue
             try:
                 if verbose > 0: