lavc: Keep idct integer option

"int" is useful in testing because provides accurate results across
different plaftforms, so remove it from the scheduled FF_API_UNUSED_MEMBERS
deprecation.

libavcodec/avcodec.h

@@ -2572,9 +2572,7 @@ typedef struct AVCodecContext {
     int dct_algo;
 #define FF_DCT_AUTO    0
 #define FF_DCT_FASTINT 1
-#if FF_API_UNUSED_MEMBERS
 #define FF_DCT_INT     2
-#endif /* FF_API_UNUSED_MEMBERS */
 #define FF_DCT_MMX     3
 #define FF_DCT_ALTIVEC 5
 #define FF_DCT_FAAN    6

libavcodec/options_table.h

@@ -191,9 +191,7 @@ static const AVOption avcodec_options[] = {
 {"dct", "DCT algorithm", OFFSET(dct_algo), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, 0, INT_MAX, V|E, "dct"},
 {"auto", "autoselect a good one (default)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_AUTO }, INT_MIN, INT_MAX, V|E, "dct"},
 {"fastint", "fast integer", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_FASTINT }, INT_MIN, INT_MAX, V|E, "dct"},
-#if FF_API_UNUSED_MEMBERS
 {"int", "accurate integer", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_INT }, INT_MIN, INT_MAX, V|E, "dct"},
-#endif /* FF_API_UNUSED_MEMBERS */
 {"mmx", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_MMX }, INT_MIN, INT_MAX, V|E, "dct"},
 {"altivec", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_ALTIVEC }, INT_MIN, INT_MAX, V|E, "dct"},
 {"faan", "floating point AAN DCT", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DCT_FAAN }, INT_MIN, INT_MAX, V|E, "dct"},