[simple-scan] Add new text resolution 200 dpi

[Bartosz <bkosiorek src gnome org>]

commit 4a3ab85ebd7c0f1338f5b0be76fcd62a886374e8
Author: Stefan Richter <sealor users noreply github com>
Date:   Wed Aug 12 21:32:28 2020 +0200

    Add new text resolution 200 dpi
    
    fixes issue #175

 src/preferences-dialog.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/preferences-dialog.vala b/src/preferences-dialog.vala
index dce34ccf..6a0e7b7b 100644
--- a/src/preferences-dialog.vala
+++ b/src/preferences-dialog.vala
@@ -276,7 +276,7 @@ private class PreferencesDialog : Gtk.Dialog
         combo.add_attribute (renderer, "text", 1);
 
         var model = combo.model as Gtk.ListStore;
-        int[] scan_resolutions = {75, 150, 300, 600, 1200, 2400};
+        int[] scan_resolutions = {75, 150, 200, 300, 600, 1200, 2400};
         foreach (var dpi in scan_resolutions)
         {
             string label;