message: Removed unused structs in libpg_query
diff: @@ -427,14 +427,14 @@ extern void srandom(unsigned int seed);
  extern char *pqStrerror(int errnum, char *strerrbuf, size_t buflen);
  #ifndef WIN32
  -extern int pqGetpwuid(uid_t uid, struct passwd * resultbuf, char *buffer,
  - size_t buflen, struct passwd ** result);
  +extern int pqGetpwuid(uid_t uid, void * resultbuf, char *buffer,
  + size_t buflen, void ** result);
  #endif
  extern int pqGethostbyname(const char *name,
  - struct hostent * resultbuf,
  + void * resultbuf,
  char *buffer, size_t buflen,
  - struct hostent ** result,
  + void ** result,
  int *herrno);
  extern void pg_qsort(void *base, size_t nel, size_t elsize,
  