patch 8.2.2084: CTRL-V U doesn't work to enter a Unicode character

Problem:    CTRL-V U doesn't work to enter a Unicode character when
            modifyOtherKeys is effective. (Ken Takata)
Solution:   Add a flag to get_literal() for the shift key. (closes #7413)
diff --git a/src/proto/edit.pro b/src/proto/edit.pro
index 1b5f46d..d1b34c3 100644
--- a/src/proto/edit.pro
+++ b/src/proto/edit.pro
@@ -10,7 +10,7 @@
 void undisplay_dollar(void);
 void truncate_spaces(char_u *line);
 void backspace_until_column(int col);
-int get_literal(void);
+int get_literal(int noReduceKeys);
 void insertchar(int c, int flags, int second_indent);
 void start_arrow(pos_T *end_insert_pos);
 int stop_arrow(void);