patch 8.0.0162: build error on Fedora 23

Problem:    Build error on Fedora 23 with small features and gnome2.
Solution:   Undefine ngettext(). (Hirohito Higashi)
diff --git a/src/version.c b/src/version.c
index 7f52cab..1c4c57b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    162,
+/**/
     161,
 /**/
     160,