patch 8.0.1202: :wall gives an errof for a terminal window

Problem:    :wall gives an errof for a terminal window. (Marius Gedminas)
Solution:   Don't try writing a buffer that can't be written. (Yasuhiro
            Matsumoto, closes #2190)
diff --git a/src/version.c b/src/version.c
index edc29cc..0f4d23b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1202,
+/**/
     1201,
 /**/
     1200,