Fix VPATH build of RQUOTA support. Some rpcgen derive #include "..." paths from the infile argument. This will be off for VPATH builds, as the generated rquota_xdr.c code will look in $(srcdir), but we'll generate the rquota.h file in $(builddir). Play safe and copy rquota.x to $(builddir) first. This fixes the build on openSUSE 11.1.

#ifndef READ_FULL_H
#define READ_FULL_H

/* Read data from file. Returns -1 if error occurred, or 0 if EOF came before
   everything was read, or 1 if all was ok. */
int read_full(int fd, void *data, size_t size);
int pread_full(int fd, void *data, size_t size, off_t offset);

#endif