patch 8.1.0222: errors are reported for "make install"

Problem:    Errors are reported for "make install".
Solution:   Skip missing language files. (Christian Brabandt, closes #3254)
diff --git a/src/version.c b/src/version.c
index 23952a0..968ff96 100644
--- a/src/version.c
+++ b/src/version.c
@@ -799,6 +799,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    222,
+/**/
     221,
 /**/
     220,