vorbisdec: cosmetics: rename variable avccontext to avctx

This is consistent with the rest of libavcodec.

libavcodec/vorbis.c

@@ -117,7 +117,7 @@ int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num)
     return 0;
 }
 
-int ff_vorbis_ready_floor1_list(AVCodecContext *avccontext,
+int ff_vorbis_ready_floor1_list(AVCodecContext *avctx,
                                 vorbis_floor1_entry *list, int values)
 {
     int i;
@@ -143,7 +143,7 @@ int ff_vorbis_ready_floor1_list(AVCodecContext *avccontext,
         int j;
         for (j = i + 1; j < values; j++) {
             if (list[i].x == list[j].x) {
-                av_log(avccontext, AV_LOG_ERROR,
+                av_log(avctx, AV_LOG_ERROR,
                        "Duplicate value found in floor 1 X coordinates\n");
                 return AVERROR_INVALIDDATA;
             }

libavcodec/vorbis.h

@@ -36,7 +36,7 @@ typedef struct vorbis_floor1_entry {
     uint16_t high;
 } vorbis_floor1_entry;
 
-int ff_vorbis_ready_floor1_list(AVCodecContext *avccontext,
+int ff_vorbis_ready_floor1_list(AVCodecContext *avctx,
                                 vorbis_floor1_entry *list, int values);
 unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n); // x^(1/n)
 int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num);