login: do not use cast to bool for enum

src/login/logind-action.c

@@ -121,7 +121,7 @@ int manager_handle_action(
                 return -EOPNOTSUPP;
         }
 
-        if (m->action_what) {
+        if (m->action_what > 0) {
                 log_debug("Action already in progress, ignoring.");
                 return -EALREADY;
         }

src/login/logind-dbus.c

@@ -1773,7 +1773,7 @@ static int method_do_shutdown_or_sleep(
                 return r;
 
         /* Don't allow multiple jobs being executed at the same time */
-        if (m->action_what)
+        if (m->action_what > 0)
                 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
 
         if (sleep_verb) {
@@ -2012,7 +2012,7 @@ static int manager_scheduled_shutdown_handler(
                 assert_not_reached("unexpected shutdown type");
 
         /* Don't allow multiple jobs being executed at the same time */
-        if (m->action_what) {
+        if (m->action_what > 0) {
                 r = -EALREADY;
                 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", target);
                 goto error;