added callback to api categories.get

public/src/forum/topic.js

@@ -102,7 +102,7 @@ define(function() {
 
 					var loadingEl = document.getElementById('categories-loading');
 					if (loadingEl) {
-						socket.once('api:categories.get', function(data) {
+						socket.emit('api:categories.get', function(data) {
 							// Render categories
 							var categoriesFrag = document.createDocumentFragment(),
 								categoryEl = document.createElement('li'),
@@ -172,7 +172,6 @@ define(function() {
 								}
 							});
 						});
-						socket.emit('api:categories.get');
 					}
 				});
 			}

src/websockets.js

@@ -591,9 +591,9 @@ websockets.init = function(io) {
 			threadTools.move(data.tid, data.cid, socket);
 		});
 
-		socket.on('api:categories.get', function() {
+		socket.on('api:categories.get', function(callback) {
 			categories.getAllCategories(0, function(err, categories) {
-				socket.emit('api:categories.get', categories);
+				callback(categories);
 			});
 		});