lavc/tableprint_vlc: Remove avpriv_request_sample() from included files.

Fixes compilation with --enable-hardcoded-tables.
Fixes ticket #7962.

(cherry picked from commit c8232e5007)

libavcodec/tableprint_vlc.h

@@ -36,6 +36,7 @@
 #define AVCODEC_AVCODEC_H
 #define AVCODEC_INTERNAL_H
 #define AV_INPUT_BUFFER_PADDING_SIZE 64 // the value does not matter for this
+#define avpriv_request_sample(...)
 #include "tableprint.h"
 #include "get_bits.h"
 #include "mathtables.c"