[PATCH] nfs-32bit-statfs-fix warning fix

With CONFIG_LBD=n:

fs/open.c: In function `vfs_statfs_native':
fs/open.c:67: warning: comparison is always true due to limited range of data type
fs/open.c:70: warning: comparison is always true due to limited range of data type

fs/open.c

@@ -64,10 +64,10 @@ static int vfs_statfs_native(struct super_block *sb, struct statfs *buf)
 			 * f_files and f_ffree may be -1; it's okay to stuff
 			 * that into 32 bits
 			 */
-			if (st.f_files != 0xffffffffffffffffULL &&
+			if (st.f_files != -1 &&
 			    (st.f_files & 0xffffffff00000000ULL))
 				return -EOVERFLOW;
-			if (st.f_ffree != 0xffffffffffffffffULL &&
+			if (st.f_ffree != -1 &&
 			    (st.f_ffree & 0xffffffff00000000ULL))
 				return -EOVERFLOW;
 		}