Small patch for irrelevant scrollbar issue

[Sebastian Zerbe <sebastian zerbe rz uni-duesseldorf de>]

Hi folks,

attached is a little patch against balsa-2.3.5 which solves an issue  
with the preview scrollbars I found. The srollbars won't be removed  
when all mailboxes are closed. You can find a screenshot of what I mean  
here:
http://user.phil-fak.uni-duesseldorf.de/~zerbe/balsa.png

Please do not feel offended by the strange mix of WinXP- and MacOS  
X-Themes I use on my system :-)

I really would appreciate if someone could commit this to CVS since it  
took me hours to find the relevant places in the code to fix it (of  
course only if you don't find any problems with the patch).

I only took the time to fix this without any knowledge of the code  
because these scrollbars not disappearing were annoying me for such a  
long time.

Regards
Sebastian Zerbe

diff -ur balsa-2.3.5/src/main-window.c balsa-2.3.5.new/src/main-window.c
--- balsa-2.3.5/src/main-window.c	2005-06-30 18:24:53.000000000 +0200
+++ balsa-2.3.5.new/src/main-window.c	2005-09-27 03:38:51.000000000 +0200
@@ -2295,6 +2295,8 @@
 #else
     real_open_mbnode(info);
 #endif
+    /* Part of the fix for scrollbar oddness */
+    gtk_widget_show(window->preview);
 }
 
 /* balsa_window_real_close_mbnode:
@@ -2343,6 +2345,9 @@
             balsa_window_idle_replace(window, NULL);
             gnome_appbar_set_default(balsa_app.appbar, "Mailbox closed");
 
+            /* Part of the fix for scrollbar oddness */
+            gtk_widget_hide(window->preview);
+
             /* Disable menus */
             balsa_window_enable_mailbox_menus(window, NULL);
             enable_message_menus(window, NULL);