CID 1508972: Uninitialized scalar variable

[maskit]

331  if (ts_lua_hex_to_bin(key_bin, key, klen) == NULL) {
332    TSfree(key_bin);
333    return luaL_error(L, "hex to binary conversion failed");
334  }
335  key_bin_len = klen / 2;
336
337  HMAC(EVP_md5(), key_bin, key_bin_len, src, slen, sha_buf, &output_length);
338
   	
CID 1508972 (#1 of 1): Uninitialized scalar variable (UNINIT)
9. uninit_use_in_call: Using uninitialized element of array sha_buf when calling ts_lua_hex_dump. [[show details](https://scan6.scan.coverity.com/eventId=34625651-13&modelId=34625651-0&fileInstanceId=162996654&filePath=%2Fplugins%2Flua%2Fts_lua_string.c&fileStart=23&fileEnd=33)]
339  ts_lua_hex_dump(hex_buf, sha_buf, sizeof(sha_buf));
340  lua_pushlstring(L, (char *)hex_buf, sizeof(hex_buf));
341
342  TSfree(key_bin);
343  return 1;
344}