updated window_procs

Add a non-string identifier to window_procs for use in runtime
identification of the current window port being used.

Use a macro WPID to add the identification at the top of the
various existing window_procs declarations. It expands to the
existing text string, as well as the newly added field wp_id
with a wp_ identifier.

For example, WPID(tty) expands to: "tty", wp_tty

The generated wp_tty must be present in the wp_ids enum at
the top of include/winprocs.h.

The WINDOWPORT(x) macro has been updated to expand to a simple
value comparison (port.wp_id == wp_x), instead of a
string comparison.

sys/windows/windsys.c

@@ -233,7 +233,7 @@ win32_abort(void)
             exit_nhwindows((char *) 0);
         iflags.window_inited = FALSE;
     }
-    if (!WINDOWPORT(mswin) && !WINDOWPORT(safe-startup))
+    if (!WINDOWPORT(mswin) && !WINDOWPORT(safestartup))
         safe_routines();
     if (wizard) {
         raw_print("Execute debug breakpoint wizard?");