Fixed parsing zero when streaming is enabled.

Author: svobol13

Diff for: src/main/java/com/jsoniter/IterImplForStreaming.java

@@ -649,8 +649,7 @@ static final int readInt(final JsonIterator iter, final byte c) throws IOExcepti
 
     static void assertNotLeadingZero(JsonIterator iter) throws IOException {
         try {
-            byte nextByte = IterImpl.readByte(iter);
-            iter.unreadByte();
+            byte nextByte = iter.buf[iter.head];
             int ind2 = IterImplNumber.intDigits[nextByte];
             if (ind2 == IterImplNumber.INVALID_CHAR_FOR_NUMBER) {
                 return;

Diff for: src/test/java/com/jsoniter/any/TestLong.java

@@ -1,10 +1,28 @@
 package com.jsoniter.any;
 
+import com.jsoniter.spi.JsonException;
 import junit.framework.TestCase;
 
 public class TestLong extends TestCase {
     public void test_to_string_should_trim() {
         Any any = Any.lazyLong(" 1000".getBytes(), 0, " 1000".length());
         assertEquals("1000", any.toString());
     }
+
+    public void test_should_fail_with_leading_zero() {
+        byte[] bytes = "01".getBytes();
+        Any any = Any.lazyLong(bytes, 0, bytes.length);
+        try {
+            any.toLong();
+            fail("This should fail.");
+        } catch (JsonException e) {
+
+        }
+    }
+
+    public void test_should_work_with_zero() {
+        byte[] bytes = "0".getBytes();
+        Any any = Any.lazyLong(bytes, 0, bytes.length);
+        assertEquals(0L, any.toLong());
+    }
 }