path.c fix warning with _FORTIFY_SOURCE

  CC    libuser/path.o
cc1: warnings being treated as errors
/usr/src/RPM/BUILD/qemu-0.11.92/path.c: In function 'new_entry':
/usr/src/RPM/BUILD/qemu-0.11.92/path.c:49: error: ignoring return value of 'asprintf', declared with attribute warn_unused_result
make[1]: *** [path.o] Error 1
Signed-off-by: NKirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

path.c

@@ -46,7 +46,10 @@ static struct pathelem *new_entry(const char *root,
 {
     struct pathelem *new = malloc(sizeof(*new));
     new->name = strdup(name);
-    asprintf(&new->pathname, "%s/%s", root, name);
+    if (asprintf(&new->pathname, "%s/%s", root, name) == -1) {
+        printf("Cannot allocate memory\n");
+        exit(1);
+    }
     new->num_entries = 0;
     return new;
 }