Fix unhandled promise rejection (#448)

.config/ags/modules/sideleft/apis/waifu.js

@@ -19,7 +19,8 @@ async function getImageViewerApp(preferredApp) {
         .then((output) => {
             if (output != '') return preferredApp;
             else return 'xdg-open';
-        });
+        })
+        .catch(print);
 }
 
 const IMAGE_REVEAL_DELAY = 13; // Some wait for inits n other weird stuff
@@ -408,4 +409,4 @@ export const sendMessage = (text) => {
 
     }
     else WaifuService.fetch(text);
-}
+}