Merge pull request niklasvh#320 from oosterholt/master

Fixed IndexSizeError in IE when the size of the image exceedes 8192 pixels

Author: niklasvh

src/renderers/Canvas.js

@@ -115,12 +115,14 @@ _html2canvas.Renderer.Canvas = function(options) {
         newCanvas.height = Math.ceil(bounds.height);
         ctx = newCanvas.getContext("2d");
 
-        ctx.drawImage(canvas, bounds.left, bounds.top, bounds.width, bounds.height, 0, 0, bounds.width, bounds.height);
+		var imgData = canvas.getContext("2d").getImageData(bounds.left, bounds.top, bounds.width, bounds.height);
+		ctx.putImageData(imgData, 0, 0);
+
         canvas = null;
         return newCanvas;
       }
     }
 
     return canvas;
   };
-};
+};