handle paste special of single formula cell with error result

This apparently was never implemented, unlike in the block pasting code that
handles it fine. Formula cells with error results were always copied as is if
numeric was requested, even if formulas weren't requested.

Change-Id: Id550c4e757b6bb2c06aa0637328216383cdf3d6b

sc/source/core/data/clipcontext.cxx

@@ -211,6 +211,13 @@ void CopyFromClipContext::setSingleCell( const ScAddress& rSrcPos, const ScColum
                 if (!bNumeric)
                     // Error code is treated as numeric value. Don't paste it.
                     rSrcCell.clear();
+                else
+                {
+                    // Turn this into a formula cell with just the error code.
+                    ScFormulaCell* pErrCell = new ScFormulaCell(mpClipDoc, rSrcPos);
+                    pErrCell->SetErrCode(nErr);
+                    rSrcCell.set(pErrCell);
+                }
             }
             else if (rSrcCell.mpFormula->IsValue())
             {