convert svx/source/table/*.cxx from String to OUString

Change-Id: I56e615eb298eef3ac736edc7637b48d630c08fe8

svx/source/table/cell.cxx

@@ -1778,17 +1778,17 @@ static OUString getCellName( sal_Int32 nCol, sal_Int32 nRow )
     }
     else
     {
-        String aStr;
+        OUString aStr;
         while (nCol >= 26)
         {
             sal_Int32 nC = nCol % 26;
-            aStr += static_cast<sal_Unicode>( 'A' +
-                    static_cast<sal_uInt16>(nC));
+            aStr += OUString( static_cast<sal_Unicode>( 'A' +
+                                static_cast<sal_uInt16>(nC)) );
             nCol = nCol - nC;
             nCol = nCol / 26 - 1;
         }
-        aStr += static_cast<sal_Unicode>( 'A' +
-                static_cast<sal_uInt16>(nCol));
+        aStr += OUString ( static_cast<sal_Unicode>( 'A' +
+                             static_cast<sal_uInt16>(nCol)) );
         aBuf.append(comphelper::string::reverseString(aStr));
     }
     aBuf.append( OUString::number(nRow+1) );

svx/source/table/tablertfexporter.cxx

@@ -175,7 +175,7 @@ void SdrTableRtfExporter::WriteCell( sal_Int32 nCol, sal_Int32 nRow )
         return ;
     }
 
-    String aContent;
+    OUString aContent;
 
     OutlinerParaObject* pParaObj = xCell->GetEditOutlinerParaObject();
     bool bOwnParaObj = pParaObj != 0;

svx/source/table/tablertfimporter.cxx

@@ -155,7 +155,7 @@ void SdrTableRTFParser::Read( SvStream& rStream )
 
     Link aOldLink( rEdit.GetImportHdl() );
     rEdit.SetImportHdl( LINK( this, SdrTableRTFParser, RTFImportHdl ) );
-    mpOutliner->Read( rStream, String(), EE_FORMAT_RTF );
+    mpOutliner->Read( rStream, OUString(), EE_FORMAT_RTF );
     rEdit.SetImportHdl( aOldLink );
 
     FillTable();