patch 8.0.1632: in a terminal dump NUL and space are different

Problem:    In a terminal dump NUL and space considered are different,
            although they are displayed the same.
Solution:   When encountering NUL handle it like space.
diff --git a/src/version.c b/src/version.c
index 473883c..6999611 100644
--- a/src/version.c
+++ b/src/version.c
@@ -767,6 +767,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1632,
+/**/
     1631,
 /**/
     1630,