vp8cx,cosmetics: correct VP9_SET_FRAME_PARALLEL_DECODING docs

this has been on by default since:
f5c36a5ce VP9: turn on tile-columns and frame-parallel-mode by default
~v1.4.0

Change-Id: I52017ab0157feaf429dce3d9e1af8a53bb5c1b65

diff --git a/vpx/vp8cx.h b/vpx/vp8cx.h
index ee6be4a249cb1e85dcaeee31af9f4dfac7c099ab..8fc114b8b9fd13636d2bf3042e999c2eaf3a4787 100644 (file)
--- a/vpx/vp8cx.h
+++ b/vpx/vp8cx.h
@@ -368,10 +368,10 @@ enum vp8e_enc_control_id {
    * VP9 has a bitstream feature to reduce decoding dependency between frames
    * by turning off backward update of probability context used in encoding
    * and decoding. This allows staged parallel processing of more than one
-   * video frames in the decoder. This control function provides a mean to
+   * video frame in the decoder. This control function provides a means to
    * turn this feature on or off for bitstreams produced by encoder.
    *
-   * By default, this feature is off.
+   * By default, this feature is on.
    *
    * Supported in codecs: VP9
    */