[PATCH 2/3] mount-fstab: clean up gcc warnings

[Randy Dunlap <randy.dunlap@xxxxxxxxxx>]

From: Randy Dunlap <randy.dunlap@xxxxxxxxxx>

Fix strict gcc warnings in tailf that come from using:
  ("-Wall -Wp,-D_FORTIFY_SOURCE=2")

fstab.c:770: warning: ignoring return value of 'chown', declared with attribute warn_unused_result

Builds cleanly on x86_32 and x86_64.

Signed-off-by: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
---
 mount/fstab.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- util-linux-ng-2.13.orig/mount/fstab.c
+++ util-linux-ng-2.13/mount/fstab.c
@@ -766,8 +766,13 @@ update_mtab (const char *dir, struct my_
 	   * from the present mtab before renaming.
 	   */
 	    struct stat sbuf;
-	    if (stat (MOUNTED, &sbuf) == 0)
-		chown (MOUNTED_TEMP, sbuf.st_uid, sbuf.st_gid);
+	    if (stat (MOUNTED, &sbuf) == 0) {
+		if (chown (MOUNTED_TEMP, sbuf.st_uid, sbuf.st_gid) < 0) {
+			int err = errno;
+			fprintf (stderr, _("Cannot chown of %s: %s\n"),
+				MOUNTED_TEMP, strerror(err));
+		}
+	    }
 	}
 
 	/* rename mtemp to mtab */
-
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