message: tga: recognize 32 bpp images as RGBA(8), fixes
diff: @@ -252,6 +252,7 @@ impl<R: Read + Seek> TGADecoder<R> {
  match (num_alpha_bits, other_channel_bits, color) {
  // really, the encoding is BGR and BGRA, this is fixed
  // up with `TGADecoder::reverse_encoding`.
  + (0, 32, true) => self.color_type = ColorType::RGBA(8),
  (8, 24, true) => self.color_type = ColorType::RGBA(8),
  (0, 24, true) => self.color_type = ColorType::RGB(8),
  (8, 8, false) => self.color_type = ColorType::GrayA(8),
  