fix crc32 & enable gzip test

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;
+    table[n] = c >>> 0;
   }
 
   return table;
@@ -23,7 +23,7 @@ function crc32(crc, buf, len, pos) {
   var t = crcTable
     , end = pos + len;
 
-  crc = 0 ^ (-1);
+  crc = crc ^ (-1);
 
   for (var i = pos; i < end; i++ ) {
     crc = (crc >>> 8) ^ t[(crc ^ buf[i]) & 0xFF];

test/deflate.js

@@ -26,7 +26,7 @@ describe('Defaults', function () {
 
   // OS_CODE can differ. Probably should add param to compare function
   // to ignore some buffer positions
-  it.skip('gzip, no options', function(done) {
+  it('gzip, no options', function(done) {
     testDeflate(zlib.createGzip, pako.gzip, samples, {}, done);
   });
 });