Fix one-off error at referencing adjust values for HSLF preset shapes

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1868460 13f79535-47bb-0310-9956-ffa450edef68

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

         }
 
 
-        EscherPropertyTypes escherProp = ADJUST_VALUES[adjInt];
+        EscherPropertyTypes escherProp = ADJUST_VALUES[adjInt-1];
 
         int adjval = getEscherProperty(escherProp, -1);