Add missing extern declarations to headers

* src/xterm.h (xi_device_from_id, xi_frame_selected_for): Add
`extern' declaration.

diff --git a/src/xterm.h b/src/xterm.h
index defeaacc0d7676ecab7782bbdabc5bfb692c69e2..a04596cdb1a6049948d68ae8ab5720d069c18ff9 100644 (file)
--- a/src/xterm.h
+++ b/src/xterm.h
@@ -1574,8 +1574,8 @@ extern bool x_dnd_in_progress;
 extern struct frame *x_dnd_frame;
 
 #ifdef HAVE_XINPUT2
-struct xi_device_t *xi_device_from_id (struct x_display_info *, int);
-bool xi_frame_selected_for (struct frame *, unsigned long);
+extern struct xi_device_t *xi_device_from_id (struct x_display_info *, int);
+extern bool xi_frame_selected_for (struct frame *, unsigned long);
 #endif
 
 extern void mark_xterm (void);