Make interrupt input optionally work on PGTK

* src/pgtkterm.c (pgtk_delete_terminal): Close display fd if it
exists.
(pgtk_term_init): Set up interrupt handling for display fd if
available.
* src/pgtkterm.h (struct pgtk_display_info): Add `connection'
field.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/pgtkterm.h b/src/pgtkterm.h
index 231c8e87064..c16221da832 100644
--- a/src/pgtkterm.h
+++ b/src/pgtkterm.h
@@ -238,6 +238,8 @@ struct pgtk_display_info
     double acc_x, acc_y;
     double x_per_char, y_per_line;
   } scroll;
+
+  int connection;
 };
 
 /* This is a chain of structures for all the PGTK displays currently in use.  */