Add end chunk zero check

Author: Maciej Mroziński

tests/DecodeChunkedStreamTest.php

@@ -101,6 +101,15 @@ public function provideInvalidChunkedEncoding()
             'header-chunk-to-long' => [
                 str_split(str_repeat('a', 2015) . "\r\nWi\r\nki\r\n5\r\npedia\r\ne\r\n in\r\n\r\nchunks.\r\n0\r\n\r\n")
             ],
+            'end-chunk-zero-check-1' => [
+                ["4\r\nWiki\r\n5\r\npedia\r\ne\r\n in\r\n\r\nchunks.\r\n00\r\n\r\n"]
+            ],
+            'end-chunk-zero-check-2' => [
+                ["4\r\nWiki\r\n5\r\npedia\r\ne\r\n in\r\n\r\nchunks.\r\n000\r\n\r\n"]
+            ],
+            'end-chunk-zero-check-3' => [
+                ["00004\r\nWiki\r\n005\r\npedia\r\ne\r\n in\r\n\r\nchunks.\r\n0000\r\n\r\n"]
+            ]
         ];
     }