[x265] [PATCH 6 of 8] doc: fix dither docs on api page (not applicable if internal bit depth != 8)

[Steve Borho]

# HG changeset patch
# User Steve Borho <steve at borho.org>
# Date 1435028287 18000
#      Mon Jun 22 21:58:07 2015 -0500
# Node ID 98d42fd1c07c746ed4c4257b36ef5d05fb0dc8f3
# Parent  25390edc448aef5ff1732bb077d080f2d254e0d2
doc: fix dither docs on api page (not applicable if internal bit depth != 8)

diff -r 25390edc448a -r 98d42fd1c07c doc/reST/api.rst
--- a/doc/reST/api.rst	Mon Jun 22 20:35:06 2015 -0500
+++ b/doc/reST/api.rst	Mon Jun 22 21:58:07 2015 -0500
@@ -41,9 +41,9 @@
 x265 will accept input pixels of any depth between 8 and 16 bits
 regardless of the depth of its internal pixels (8 or 10).  It will shift
 and mask input pixels as required to reach the internal depth. If
-downshifting is being performed using our CLI application, the
-:option:`--dither` option may be enabled to reduce banding. This feature
-is not available through the C interface.
+downshifting is being performed using our CLI application (to 8 bits),
+the :option:`--dither` option may be enabled to reduce banding. This
+feature is not available through the C interface.
 
 Encoder
 =======