patch 8.2.1633: some error messages are internal but do not use iemsg()

Problem:    Some error messages are internal but do not use iemsg().
Solution:   Use iemsg(). (Dominique Pellé, closes #6894)
diff --git a/src/version.c b/src/version.c
index 2a13bf3..1b91560 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1633,
+/**/
     1632,
 /**/
     1631,