Use the SELECT_* enum for a few more uxsel flags.

This cleans up some spots that were missed in 47202c4e16.

unix/gtkcomm.c

@@ -107,18 +107,18 @@ uxsel_id *uxsel_input_add(int fd, int rwx) {
 
 #if GTK_CHECK_VERSION(2,0,0)
     int flags = 0;
-    if (rwx & 1) flags |= G_IO_IN | G_IO_HUP;
-    if (rwx & 2) flags |= G_IO_OUT;
-    if (rwx & 4) flags |= G_IO_PRI;
+    if (rwx & SELECT_R) flags |= G_IO_IN | G_IO_HUP;
+    if (rwx & SELECT_W) flags |= G_IO_OUT;
+    if (rwx & SELECT_X) flags |= G_IO_PRI;
     id->chan = g_io_channel_unix_new(fd);
     g_io_channel_set_encoding(id->chan, NULL, NULL);
     id->watch_id = g_io_add_watch_full(id->chan, GDK_PRIORITY_REDRAW+1, flags,
                                        fd_input_func, NULL, NULL);
 #else
     int flags = 0;
-    if (rwx & 1) flags |= GDK_INPUT_READ;
-    if (rwx & 2) flags |= GDK_INPUT_WRITE;
-    if (rwx & 4) flags |= GDK_INPUT_EXCEPTION;
+    if (rwx & SELECT_R) flags |= GDK_INPUT_READ;
+    if (rwx & SELECT_W) flags |= GDK_INPUT_WRITE;
+    if (rwx & SELECT_X) flags |= GDK_INPUT_EXCEPTION;
     assert(flags);
     id->id = gdk_input_add(fd, flags, fd_input_func, NULL);
 #endif

unix/uxser.c

@@ -417,9 +417,9 @@ static void serial_uxsel_setup(Serial *serial)
     int rwx = 0;
 
     if (serial->inbufsize <= SERIAL_MAX_BACKLOG)
-	rwx |= 1;
+	rwx |= SELECT_R;
     if (bufchain_size(&serial->output_data))
-        rwx |= 2;                      /* might also want to write to it */
+        rwx |= SELECT_W;               /* might also want to write to it */
     uxsel_set(serial->fd, rwx, serial_select_result);
 }