MT#55283 version-guard avcodec_close()

This has been deprecated in favour of avcodec_free_context()

Change-Id: I517f2f2435c66450c876857e03324fb5d24814de

lib/codeclib.c

@@ -1910,7 +1910,9 @@ err:
 
 static void avc_encoder_close(encoder_t *enc) {
 	if (enc->avc.avcctx) {
+#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(61, 0, 0)
 		avcodec_close(enc->avc.avcctx);
+#endif
 		avcodec_free_context(&enc->avc.avcctx);
 	}
 	enc->avc.avcctx = NULL;