fix, mac hwcodec decoding align use dst_align (#8215)

Signed-off-by: 21pages <sunboeasy@gmail.com>

src/flutter.rs

@@ -445,7 +445,7 @@ impl VideoRenderer {
                     rgba.raw.len() as _,
                     rgba.w as _,
                     rgba.h as _,
-                    rgba.stride() as _,
+                    rgba.align() as _,
                 )
             };
         }