Fixed block_Realloc.

src/misc/block.c

@@ -78,6 +78,7 @@ static void BlockRelease( block_t *p_block )
 
 static void BlockMetaCopy( block_t *restrict out, const block_t *in )
 {
+    out->p_next    = in->p_next;
     out->i_dts     = in->i_dts;
     out->i_pts     = in->i_pts;
     out->i_flags   = in->i_flags;