Add method to return the number of styles (bug #43883)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@595701 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -285,6 +285,14 @@ public class StyleSheet implements HDFType
       }
   }
 
+  /**
+   * Gets the number of styles in the style sheet.
+   * @return The number of styles in the style sheet.
+   */
+  public int numStyles() {
+      return _styleDescriptions.length;
+  }
+
   /**
    * Gets the StyleDescription at index x.
    *