[rtems commit] posix: Fix unused result warning

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    c6023b75bb0c2c0814b26e3419cc9505fa99d36e
Changeset: http://git.rtems.org/rtems/commit/?id=c6023b75bb0c2c0814b26e3419cc9505fa99d36e

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Fri Oct 12 14:40:52 2018 +0200

posix: Fix unused result warning

---

 cpukit/posix/src/mmap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cpukit/posix/src/mmap.c b/cpukit/posix/src/mmap.c
index 9d9c063..de7d5b2 100644
--- a/cpukit/posix/src/mmap.c
+++ b/cpukit/posix/src/mmap.c
@@ -219,8 +219,8 @@ void *mmap(
   } else if ( map_private ) {
     /* private mappings of shared memory do not need special treatment. */
     is_shared_shm = false;
-    posix_memalign( &mapping->addr, PAGE_SIZE, len );
-    if ( !mapping->addr ) {
+    err = posix_memalign( &mapping->addr, PAGE_SIZE, len );
+    if ( err != 0 ) {
       free( mapping );
       errno = ENOMEM;
       return MAP_FAILED;