NFSv4.1: change pg_test return type to bool

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 568ab0e..212fc29 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1043,7 +1043,7 @@
 	goto out;
 }
 
-int
+bool
 pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
 		     struct nfs_page *req)
 {
@@ -1070,7 +1070,7 @@
 	} else if (pgio->pg_lseg &&
 		   req_offset(req) > end_offset(pgio->pg_lseg->pls_range.offset,
 						pgio->pg_lseg->pls_range.length))
-		return 0;
+		return false;
 	return NFS_SERVER(pgio->pg_inode)->pnfs_curr_ld->pg_test(pgio, prev, req);
 }