Fix potential resource leak

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/fileupload/trunk@1568661 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/test/java/org/apache/commons/fileupload/ProgressListenerTest.java b/src/test/java/org/apache/commons/fileupload/ProgressListenerTest.java
index 884f8f8..6de848d 100644
--- a/src/test/java/org/apache/commons/fileupload/ProgressListenerTest.java
+++ b/src/test/java/org/apache/commons/fileupload/ProgressListenerTest.java
@@ -120,6 +120,7 @@
                 }
             }
             assertEquals(-1, istream.read());
+            istream.close();
         }
         assertTrue(!iter.hasNext());
         listener.checkFinished();