vdpau_mpeg4: Do not fail on unknown profile.

This is a regression, previous code did not require
users to set the profile to use VDPAU.
In addition, ASP is a superset of SP, so there is not
even a good reason to require it.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

libavcodec/vdpau_mpeg4.c

@@ -119,6 +119,9 @@ static int vdpau_mpeg4_init(AVCodecContext *avctx)
     case FF_PROFILE_MPEG4_SIMPLE:
         profile = VDP_DECODER_PROFILE_MPEG4_PART2_SP;
         break;
+    // As any ASP decoder must be able to decode SP, this
+    // should be a safe fallback if profile is unknown/unspecified.
+    case FF_PROFILE_UNKNOWN:
     case FF_PROFILE_MPEG4_ADVANCED_SIMPLE:
         profile = VDP_DECODER_PROFILE_MPEG4_PART2_ASP;
         break;