added set accessor to indentation level

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@643831 13f79535-47bb-0310-9956-ffa450edef68

src/scratchpad/src/org/apache/poi/hslf/usermodel/RichTextRun.java

@@ -424,6 +424,15 @@ public class RichTextRun {
         return paragraphStyle == null ? 0 : paragraphStyle.getReservedField();
     }
 
+    /**
+     * Sets indentation level
+     *
+     * @param level indentation level. Must be in the range [0, 5]
+     */
+    public void setIndentLevel(int level) {
+        if(paragraphStyle != null ) paragraphStyle.setReservedField((short)level);
+    }
+
     /**
      * Sets whether this rich text run has bullets
      */