cast parameter to int

Author: disjukr

bower.json

@@ -1,7 +1,7 @@
 {
   "name": "croquis.js",
   "main": "croquis.js",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "homepage": "https://github.com/disjukr/croquis.js",
   "authors": [
     "JongChan Choi <disjukr@naver.com>"

croquis.js

@@ -619,6 +619,8 @@ function Croquis(imageDataList, properties) {
         };
     }
     self.pickColor = function (x, y, index) {
+        x = x | 0; // cast to int
+        y = y | 0;
         if ((x < 0) || (x >= size.width) || (y < 0) || (y >= size.height))
             return null;
         index = (index == null) ? layerIndex : index;