TableRef: clone mxAreaRefRPN

... in case formula is copied to rewrite some tokens.

Change-Id: I005e9fa354da1a5ebc7a78670337b403ffb21567

sc/source/core/tool/token.cxx

@@ -839,6 +839,7 @@ ScTableRefToken::ScTableRefToken( sal_uInt16 nIndex, ScTableRefToken::Item eItem
 
 ScTableRefToken::ScTableRefToken( const ScTableRefToken& r ) :
     FormulaToken(r),
+    mxAreaRefRPN(r.mxAreaRefRPN),
     mnIndex(r.mnIndex),
     meItem(r.meItem)
 {