Add StripMetadata back

vips/image.go

@@ -317,12 +317,13 @@ func NewTiffExportParams() *TiffExportParams {
 // GifExportParams are options when exporting a GIF to file or buffer
 // Please note that if vips version is above 8.12, then `vips_gifsave_buffer` is used, and only `Dither`, `Effort`, `Bitdepth` is used.
 // If vips version is below 8.12, then `vips_magicksave_buffer` is used, and only `Bitdepth`, `Quality` is used.
+// StripMetadata does nothing to Gif images.
 type GifExportParams struct {
 	StripMetadata bool
-	Quality  int
-	Dither   float64
-	Effort   int
-	Bitdepth int
+	Quality       int
+	Dither        float64
+	Effort        int
+	Bitdepth      int
 }
 
 // NewGifExportParams creates default values for an export of a GIF image.