add missing map init from application.init() (#3426)

* add missing map init from `application.init()`

* add changelog entry for #3426

---------

Co-authored-by: Lea Anthony <lea.anthony@gmail.com>

mkdocs-website/docs/en/changelog.md

@@ -61,6 +61,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix the import paths of model files in JS code produced by the binding generator by [@fbbdev](https://github.com/fbbdev) in [#3334](https://github.com/wailsapp/wails/pull/3334)
 - Fix drag-n-drop on some linux distros by [@abichinger](https://github.com/abichinger) in [#3346](https://github.com/wailsapp/wails/pull/3346)
 - Fix missing task for macOS when using `wails3 task dev` by [@hfoxy](https://github.com/hfoxy) in [#3417](https://github.com/wailsapp/wails/pull/3417)
+- Fix registering events causing a nil map assignment by [@hfoxy](https://github.com/hfoxy) in [#3426](https://github.com/wailsapp/wails/pull/3426)
 - Fix unmarshaling of bound method parameters by [@fbbdev](https://github.com/fbbdev) in [#3431](https://github.com/wailsapp/wails/pull/3431)
 - Fix handling of multiple return values from bound methods by [@fbbdev](https://github.com/fbbdev) in [#3431](https://github.com/wailsapp/wails/pull/3431)
 

v3/pkg/application/application.go

@@ -333,6 +333,7 @@ type App struct {
 }
 
 func (a *App) init() {
+	a.applicationEventHooks = make(map[uint][]*eventHook)
 	a.applicationEventListeners = make(map[uint][]*EventListener)
 	a.windows = make(map[uint]Window)
 	a.systemTrays = make(map[uint]*SystemTray)