Fixed error with reverse danmaku in CSS mode

Author: jabbany

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2014 Jim Chen
+Copyright (c) 2017 Jim Chen
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
 and associated documentation files (the "Software"), to deal in the Software without restriction, 

dist/CommentCoreLibrary.js

@@ -655,21 +655,24 @@ var CssScrollComment = (function (_super) {
             return (this.ttl / this.dur) * (this.parent.width + this.width) - this.width;
         },
         set: function (x) {
-            if (typeof this._x === "number") {
+            if (this._x !== null && typeof this._x === "number") {
                 var dx = x - this._x;
                 this._x = x;
-                CssCompatLayer.transform(this.dom, "translateX(" + dx + "px)");
+                CssCompatLayer.transform(this.dom, "translateX(" +
+                    (this.axis % 2 === 0 ? dx : -dx) + "px)");
             }
             else {
                 this._x = x;
                 if (!this.absolute) {
                     this._x *= this.parent.width;
                 }
-                if (this.align % 2 === 0) {
-                    this.dom.style.left = this._x + "px";
+                if (this.axis % 2 === 0) {
+                    this.dom.style.left =
+                        (this._x + (this.align % 2 === 0 ? 0 : -this.width)) + 'px';
                 }
                 else {
-                    this.dom.style.right = this._x + "px";
+                    this.dom.style.right =
+                        (this._x + (this.align % 2 === 0 ? -this.width : 0)) + 'px';
                 }
             }
         },
@@ -688,10 +691,11 @@ var CssScrollComment = (function (_super) {
         this._dirtyCSS = true;
     };
     CssScrollComment.prototype.stop = function () {
-        this.dom.style.transition = "";
+        _super.prototype.stop.call(this);
+        this.dom.style.transition = '';
         this.x = this._x;
         this._x = null;
-        this.x = (this.ttl / this.dur) * (this.parent.width + this.width) - this.width;
+        this.x = this.x;
         this._dirtyCSS = true;
     };
     return CssScrollComment;

dist/CommentCoreLibrary.min.js

@@ -83,7 +83,7 @@ Alignment: 对齐锚点（方形四角）。此数的高位表示上下，低位
 设定后x,y坐标的锚点将变成对应的方形角。不过，在右和下的对齐时，读取 x,y 坐标不一定准确，而且因为
 效率低所以不推荐。比如 top right 模式下，读 x 坐标效率比较低，但是读 y 就要好很多。
 
-注意：`>4`的模式未必在所有状态下都支持！
+注意：`>=4`的模式未必在所有状态下都支持！
 
 ### absolute <Bool> =  true
 Absolute Coordinates: 是否使用绝对坐标。当 `absolute === false` 时，x,y坐标将会表示相对