修改获取系统消息第一页分页的问题

app/service/forumMessageService.js

@@ -193,7 +193,7 @@ exports.getMessages= function(conditions, status, pageNo, pageSize, callback) {
 				}
 			}
 			var total = messages.length;
-			var skip = (pageNo - 1) * pageSize;
+			var skip = (pageNo == 0 ? 0 : (pageNo - 1)) * pageSize;
 		    var limit = total - skip > pageSize ? pageSize : (total - skip);
 			//获取分页后的数组
 			messages = messages.slice(skip,limit);