Reduce indentation by early bail-out.

Change-Id: Iaac628d2629bf1ff96fd1709e358ae9eed3fca02

sc/source/ui/view/viewfunc.cxx

@@ -357,8 +357,13 @@ void ScViewFunc::EnterData( SCCOL nCol, SCROW nRow, SCTAB nTab,
     ScDocShellModificator aModificator( *pDocSh );
 
     ScEditableTester aTester( pDoc, nCol,nRow, nCol,nRow, rMark );
-    if (aTester.IsEditable())
+    if (!aTester.IsEditable())
     {
+        ErrorMessage(aTester.GetMessageId());
+        PaintArea(nCol, nRow, nCol, nRow);        // possibly the edit-engine is still painted there
+        return;
+    }
+
     if ( bRecord )
         rFunc.EnterListAction( STR_UNDO_ENTERDATA );
 
@@ -574,12 +579,6 @@ void ScViewFunc::EnterData( SCCOL nCol, SCROW nRow, SCTAB nTab,
 
     aModificator.SetDocumentModified();
     lcl_PostRepaintCondFormat( pDoc->GetCondFormat( nCol, nRow, nTab ), pDocSh );
-    }
-    else
-    {
-        ErrorMessage(aTester.GetMessageId());
-        PaintArea( nCol, nRow, nCol, nRow );        // possibly the edit-engine is still painted there
-    }
 }
 
 // enter value in single cell (on nTab only)