fix NPE

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1160596 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -72,9 +72,11 @@ public final class CHPX extends BytePropertyNode<CHPX>
         }
 
         CharacterProperties baseStyle = ss.getCharacterStyle( istd );
+        if (baseStyle == null)
+            baseStyle = new CharacterProperties();
+
         CharacterProperties props = CharacterSprmUncompressor.uncompressCHP(
                 baseStyle, getGrpprl(), 0 );
-        ;
         return props;
     }