Fix SVGs not always being thumbnailed

CHANGELOG.md

@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 * Fixed media purge API not being able to delete thumbnails.
 * Fixed thumbnails being attempted for disabled media types.
+* Fixed SVG and other non-dimensional media failing to be usefully thumbnailed in some cases.
 
 ## [1.3.0] - September 8, 2023
 

thumbnailing/thumbnail.go

@@ -53,7 +53,7 @@ func GenerateThumbnail(imgStream io.ReadCloser, contentType string, width int, h
 	// TODO: Why does AdjustProperties even take `canAnimate` if it's always been hardcoded to `false`? (see git blame on this comment)
 	var shouldThumbnail bool
 	shouldThumbnail, width, height, _, method = u.AdjustProperties(w, h, width, height, animated, false, method)
-	if !shouldThumbnail {
+	if !shouldThumbnail && dimensional {
 		return nil, common.ErrMediaDimensionsTooSmall
 	}