fdo#81516 Support fonts like Source Han Sans with > 16 FDArray elements

Change-Id: I3f82574f434060d62dc3faeb730341c5b169ce9f

vcl/source/fontsubset/cff.cxx

@@ -360,7 +360,7 @@ private:
     const char**    mpCharStringOps;
     const char**    mpCharStringEscs;
 
-    CffLocal    maCffLocal[16];
+    CffLocal    maCffLocal[256];
     CffLocal*   mpCffLocal;
 
     void        readDictOp( void);