pass lint; work around chromium jit bug

core/bitArray.js

@@ -50,11 +50,14 @@ sjcl.bitArray = {
    * @return {Number} The requested slice.
    */
   extract: function(a, bstart, blength) {
-    var x, sh = (-bstart-blength) & 31;
+    // FIXME: this Math.floor is not necessary at all, but for some reason
+    // seems to suppress a bug in the Chromium JIT.
+    var x, sh = Math.floor((-bstart-blength) & 31);
     if ((bstart + blength - 1 ^ bstart) & -32) {
       // it crosses a boundary
       x = (a[bstart/32|0] << (32 - sh)) ^ (a[bstart/32+1|0] >>> sh);
     } else {
+      // within a single word
       x = a[bstart/32|0] >>> sh;
     }
     return x & ((1<<blength) - 1);