patch 8.1.2248: CTRL-W dot does not work when modifyOtherKeys is enabled

Problem:    CTRL-W dot does not work in a terminal when modifyOtherKeys is
            enabled.
Solution:   Use the modifier when needed.  Pass the modifier along with the
            key to avoid mistakes.
diff --git a/src/proto/terminal.pro b/src/proto/terminal.pro
index 52bb1b8..5206add 100644
--- a/src/proto/terminal.pro
+++ b/src/proto/terminal.pro
@@ -13,7 +13,7 @@
 int term_check_timers(int next_due_arg, proftime_T *now);
 int term_in_normal_mode(void);
 void term_enter_job_mode(void);
-int send_keys_to_term(term_T *term, int c, int typed);
+int send_keys_to_term(term_T *term, int c, int modmask, int typed);
 int terminal_is_active(void);
 cursorentry_T *term_get_cursor_shape(guicolor_T *fg, guicolor_T *bg);
 int term_use_loop(void);