add SEPX.toString() for debug purposes

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1142979 13f79535-47bb-0310-9956-ffa450edef68

src/scratchpad/src/org/apache/poi/hwpf/model/SEPX.java

@@ -58,4 +58,10 @@ public final class SEPX extends BytePropertyNode
     }
     return false;
   }
+
+    public String toString()
+    {
+        return "SEPX from " + getStart() + " to " + getEnd() + " (in bytes "
+                + getStartBytes() + " to " + getEndBytes() + ")";
+    }
 }