Fixed issue #514. Read only setting not working properly.

--HG--
branch : develop

ChangeLog.txt

@@ -30,6 +30,7 @@
 - [#128] New Tool: Slash and Spread.
 - [#409] New feature: Export measurement file to Excel .csv.
 - [#180] New feature: Search field in tape app and dialog Increments.
+- [#514] Read only setting not working properly.
 
 # Version 0.4.5
 - [#435] Valentina doesn't change the cursor.

src/app/valentina/mainwindow.cpp

@@ -3327,7 +3327,14 @@ bool MainWindow::MaybeSave()
         switch (ret)
         {
             case QMessageBox::Yes:
+                if (doc->IsReadOnly())
+                {
+                    return SaveAs();
+                }
+                else
+                {
                     return Save();
+                }
             case QMessageBox::No:
                 return true;
             case QMessageBox::Cancel: