On LetterBox make a Pillarbox if aspect ratio is equal

If background video and Vocaluxe have the same aspect ratio, switching to aspect ratio LetterBox would do a Pillarbox, so you can add 4:3 borders, if a video file has the wrong aspect ratio (maybe SAR value at 16:9, but a DAR value at 4:3). Without this change, LetterBox would do exactly the same as Crop in this special case.

VocaluxeLib/CHelper.cs

@@ -1,4 +1,4 @@
-#region license
+#region license
 // This file is part of Vocaluxe.
 // 
 // Vocaluxe is free software: you can redistribute it and/or modify
@@ -101,6 +101,7 @@ namespace VocaluxeLib
 
             switch (aspect)
             {
+                case EAspect.Automatic:
                 case EAspect.Crop:
                     if (boundsAspectRatio >= aspectRatio)
                     {
@@ -138,7 +139,12 @@ namespace VocaluxeLib
                     }
                     break;
                 case EAspect.LetterBox:
-                    if (boundsAspectRatio <= aspectRatio)
+                    if (boundsAspectRatio == aspectRatio)  // Pillarbox
+                    {
+                        scaledWidth = bounds.W * 0.77f;
+                        scaledHeight = bounds.W / aspectRatio;
+                    }
+                    else if (boundsAspectRatio < aspectRatio)
                     {
                         scaledWidth = bounds.W;
                         scaledHeight = bounds.W / aspectRatio;