Fix crash when no action is available.

diff --git a/JoystickController.m b/JoystickController.m
index dfa246f..8b350a4 100644 (file)
--- a/JoystickController.m
+++ b/JoystickController.m
@@ -60,7 +60,7 @@ static void input_callback(void *ctx, IOReturn inResult, void *inSender, IOHIDVa
     if (((ApplicationController *)[NSApplication sharedApplication].delegate).active) {
         JSAction *mainAction = [js actionForEvent:value];
         [mainAction notifyEvent:value];
-        NSArray *children = mainAction.children ? mainAction.children : @[mainAction];
+        NSArray *children = mainAction.children ? mainAction.children : mainAction ? @[mainAction] : @[];
         for (JSAction *subaction in children) {
             Target *target = [controller.currentConfig getTargetForAction:subaction];
             target.magnitude = mainAction.magnitude;