write all buffered data to the stream in TarOutputStream#finish. PR 50014

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1027431 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/tar/TarBuffer.java

@@ -418,7 +418,7 @@ public class TarBuffer {
     /**
      * Flush the current data block if it has any data in it.
      */
-    private void flushBlock() throws IOException {
+    void flushBlock() throws IOException {
         if (debug) {
             System.err.println("TarBuffer.flushBlock() called.");
         }

src/main/org/apache/tools/tar/TarOutputStream.java

@@ -132,6 +132,7 @@ public class TarOutputStream extends FilterOutputStream {
         // http://issues.apache.org/bugzilla/show_bug.cgi?id=28776
         writeEOFRecord();
         writeEOFRecord();
+        buffer.flushBlock();
     }
 
     /**