For some JVMs, Sun elects to throw a IOException when an InputStreamR…

…eader encounters a zero. For example, see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4684515. This prevents JAMES IMAP from functioning correct when faced with some large emails. Most clients will simply call this method again if zero is returned so I think that this fix should reasonably safe but please review.

git-svn-id: https://svn.apache.org/repos/asf/james/mime4j/trunk@675781 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/james/mime4j/MimeBoundaryInputStream.java

@@ -115,7 +115,7 @@ public int read(byte[] b, int off, int len) throws IOException {
         }
         fillBuffer();
         if (!hasData()) {
-            return 0;
+            return read(b, off, len);
         }
         int chunk = Math.min(len, limit - buffer.pos());
         return buffer.read(b, off, chunk);