codec/x264.c: workaround for "late buffer for mux input" error

With this code changes the dice rolls favorable for vlc and transcoding
a 13 MiB/s stream results in smooth playback and streaming. This is a
workaround that happens to now, but is probably not going to work in another
situation.

modules/codec/x264.c

@@ -1296,7 +1296,22 @@ static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
 #if X264_BUILD >= 98
     x264_picture_init( &pic );
 #else
-    memset( &pic, 0, sizeof( x264_picture_t ) );
+    //memset( &pic, 0, sizeof( x264_picture_t ) );
+#if 0
+    pic.i_type = 0;
+    pic.i_qpplus1 = 0;
+    pic.b_keyframe = 0;
+    pic.img.i_csp = 0;
+    pic.img.i_plane = 0;
+    for( i=0; i<4; i++) {
+        pic.img.i_stride[i] = 0;
+        pic.img.plane[i] = NULL;
+    }
+#else
+    pic.i_dts = pic.i_pts = 0;
+    pic.param = NULL;
+    pic.opaque = NULL;
+#endif
 #endif
     if( likely(p_pict) ) {
        pic.i_pts = p_pict->date;
@@ -1316,6 +1331,9 @@ static block_t *Encode( encoder_t *p_enc, picture_t *p_pict )
 
        x264_encoder_encode( p_sys->h, &nal, &i_nal, &pic, &pic );
     } else {
+#if X264_BUILD < 98
+      memset( &pic, 0, sizeof( x264_picture_t ) );
+#endif
        if( x264_encoder_delayed_frames( p_sys->h ) ) {
            x264_encoder_encode( p_sys->h, &nal, &i_nal, NULL, &pic );
        }