vdpau: Rename union, avoid name conflict with vdpau

Fixes Ticket2203
Reviewed-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/vdpau.h

@@ -52,7 +52,7 @@
 #include <vdpau/vdpau.h>
 #include <vdpau/vdpau_x11.h>
 
-union VdpPictureInfo {
+union FFVdpPictureInfo {
     VdpPictureInfoH264        h264;
     VdpPictureInfoMPEG1Or2    mpeg;
     VdpPictureInfoVC1          vc1;
@@ -88,7 +88,7 @@ typedef struct AVVDPAUContext {
      *
      * Set by libavcodec.
      */
-    union VdpPictureInfo info;
+    union FFVdpPictureInfo info;
 
     /**
      * Allocated size of the bitstream_buffers table.
@@ -143,7 +143,7 @@ struct vdpau_render_state {
     VdpBitstreamBuffer *bitstream_buffers;
 
     /** picture parameter information for all supported codecs */
-    union VdpPictureInfo info;
+    union FFVdpPictureInfo info;
 };
 
 /* @}*/