Additional Fix error on startup when no Apps or Radio plugins are installed for Squeezebox (home-assistant#150475)

Author: peteS-UK

homeassistant/components/squeezebox/browse_media.py

@@ -157,7 +157,7 @@ async def async_init(self, player: Player, browse_limit: int) -> None:
 
         cmd = ["apps", 0, browse_limit]
         result = await player.async_query(*cmd)
-        if result["appss_loop"]:
+        if result and result.get("appss_loop"):
             for app in result["appss_loop"]:
                 app_cmd = "app-" + app["cmd"]
                 if app_cmd not in self.known_apps_radios:
@@ -169,7 +169,7 @@ async def async_init(self, player: Player, browse_limit: int) -> None:
                     )
         cmd = ["radios", 0, browse_limit]
         result = await player.async_query(*cmd)
-        if result["radioss_loop"]:
+        if result and result.get("radioss_loop"):
             for app in result["radioss_loop"]:
                 app_cmd = "app-" + app["cmd"]
                 if app_cmd not in self.known_apps_radios: