removed unnecessary uint cast

lib/zlib/crc32.js

@@ -9,7 +9,7 @@ function makeTable() {
     for(var k =0; k < 8; k++){
       c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
     }
-    table[n] = c >>> 0;
+    table[n] = c;
   }
 
   return table;