valgrind: on success aHDFData is out of scope

and pData points to data belonging to it

Change-Id: I2a3c1f73e4cdcb07d21ef14cb410d351f39cdba8

xmlhelp/source/cxxhelp/provider/databases.cxx

@@ -751,12 +751,12 @@ void KeywordInfo::KeywordElement::init( Databases *pDatabases,helpdatafileproxy:
         listId[i] = id[i];
         listAnchor[i] = anchor[i];
 
+        helpdatafileproxy::HDFData aHDFData;
         const sal_Char* pData = NULL;
 
         if( pHdf )
         {
             OString idi( id[i].getStr(),id[i].getLength(),RTL_TEXTENCODING_UTF8 );
-            helpdatafileproxy::HDFData aHDFData;
             bool bSuccess = pHdf->getValueForKey( idi, aHDFData );
             if( bSuccess )
                 pData = aHDFData.getData();