From 0f8a2d2860c86c859064546876b2c99992dfd50d Mon Sep 17 00:00:00 2001
From: Pavel Sanda <sanda@lyx.org>
Date: Thu, 27 Mar 2014 01:10:59 -0700
Subject: [PATCH] Squash gcc warning.

http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg183142.html
---
 src/support/filetools.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/support/filetools.cpp b/src/support/filetools.cpp
index 0012481681..92aeaf7fb4 100644
--- a/src/support/filetools.cpp
+++ b/src/support/filetools.cpp
@@ -1080,8 +1080,9 @@ int fileLock(const char * lock_file)
 void fileUnlock(int fd, const char * /* lock_file*/)
 {
 #if defined(HAVE_LOCKF)
-	if ( fd >= 0) {
-		(void) lockf(fd, F_ULOCK, 0);
+	if (fd >= 0) {
+		if (lockf(fd, F_ULOCK, 0))
+			LYXERR0("Can't unlock the file.");
 		close(fd);
 	}
 #endif