patch 8.1.1848: 'langmap' is not used for CTRL-W command in terminal

Problem:    'langmap' is not used for CTRL-W command in terminal.
Solution:   Push the command in the typeahead buffer instead of the stuff
            buffer. (closes #4814)

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1848,
 /**/
     1847,
 /**/