More detail in Exception message

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/sanselan/trunk@996316 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/sanselan/common/BinaryFileFunctions.java b/src/main/java/org/apache/sanselan/common/BinaryFileFunctions.java
index 12dcc0e..3648ca7 100644
--- a/src/main/java/org/apache/sanselan/common/BinaryFileFunctions.java
+++ b/src/main/java/org/apache/sanselan/common/BinaryFileFunctions.java
@@ -501,7 +501,7 @@
             int count = is.read(result, read, length - read);
             // Debug.debug("count", count);
             if (count < 1)
-                throw new IOException(exception);
+                throw new IOException(exception+" count: "+ count + " read: "+read+" length: "+length);
 
             read += count;
         }