xv: struct "EncodingInfo": add explicit align pad

The align pad is needed so that a in list of struct "EncodingInfo",
the 32-bit fiels in subsequent "EncodingInfo" are aligned.
(the field "encoding" is a 32-bit value, and the field "rate"
contains two 32-bit values)

The xv-protocol-spec does not contain the protocol encoding.
(it specifies the protocol on a higher level)

The X-Server uses function "WriteToClient" to write the list "name"
to the connection:
http://cgit.freedesktop.org/xorg/xserver/tree/Xext/xvdisp.c?id=xorg-server-1.17.99.901#n456

Function "WriteToClient" does 4-byte alignment padding:
http://cgit.freedesktop.org/xorg/xserver/tree/os/io.c?id=xorg-server-1.17.99.901#n804

Signed-off-by: Christian Linhart <chris@demorecorder.com>
Reviewed-by: Peter Harris <pharris@opentext.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/xv.xml b/src/xv.xml
index 47a05d0..d99711c 100644
--- a/src/xv.xml
+++ b/src/xv.xml
@@ -118,6 +118,7 @@ authorization from the authors.
         <list type="char" name="name">
             <fieldref>name_size</fieldref>
         </list>
+        <pad align="4" />
     </struct>
 
     <struct name="Image">