libavformat/wav.c:165: error: Uninitialized Value
  The value read from size was never initialized.

libavformat/wav.c:165:5: 
163.         avio_seek(pb, size, SEEK_CUR);
164.     }
165.     return size;
         ^
166. }
167. 

static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
{
    unsigned int tag;
    int64_t size;
    for (;;) {
        if (url_feof(pb))
            return -1;
        size = next_tag(pb, &tag);
        if (tag == tag1)
            break;
        avio_seek(pb, size, SEEK_CUR);
    }
    return size;
}
['static int64_t find_tag(AVIOContext *pb, uint32_t tag1)\n{\n    unsigned int tag;\n    int64_t size;\n    for (;;) {\n        if (url_feof(pb))\n            return -1;\n        size = next_tag(pb, &tag);\n        if (tag == tag1)\n            break;\n        avio_seek(pb, size, SEEK_CUR);\n    }\n    return size;\n}']