os/os-qnx: fix overwrite of 'errno'

You can't call perror() and expect errno to retain the same value,
it'll be zero after that. On top of that, there's no reason to
print the error here, the higher up layers will do that when an error
is returned.

Fixes: 946733c ("Support QNX OS platform")
Signed-off-by: Jens Axboe <axboe@kernel.dk>

os/os-qnx.h

@@ -54,15 +54,14 @@ typedef unsigned int __u32;
 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
 {
  struct stat statbuf;
+
  if (fstat(f->fd, &statbuf) == -1) {
- perror("fstat");
- } else {
- *bytes = (unsigned long long)(statbuf.st_blocksize * statbuf.st_nblocks);
- return 0;
+ *bytes = 0;
+ return errno;
  }
 
- *bytes = 0;
- return errno;
+ *bytes = (unsigned long long)(statbuf.st_blocksize * statbuf.st_nblocks);
+ return 0;
 }
 
 static inline int blockdev_invalidate_cache(struct fio_file *f)