oledlg: Constify some variables

[Andrew Talbot]

Changelog:
    oledlg: Constify some variables.

diff -urN a/dlls/oledlg/pastespl.c b/dlls/oledlg/pastespl.c
--- a/dlls/oledlg/pastespl.c	2007-05-25 20:46:03.000000000 +0100
+++ b/dlls/oledlg/pastespl.c	2007-08-04 15:43:42.000000000 +0100
@@ -83,7 +83,7 @@
     TRACE("flags %08x %s\n", flags, flagstr);
 }
 
-static void dump_pastespecial(LPOLEUIPASTESPECIALW ps)
+static void dump_pastespecial(const OLEUIPASTESPECIALW *ps)
 {
     UINT i;
     dump_ps_flags(ps->dwFlags);
@@ -363,7 +363,7 @@
         EnableWindow(GetDlgItem(hdlg, IDOK), 0);
 }
 
-static void update_src_text(HWND hdlg, ps_struct_t *ps_struct)
+static void update_src_text(HWND hdlg, const ps_struct_t *ps_struct)
 {
     WCHAR *str;
 
@@ -403,7 +403,7 @@
     EnableWindow(change_icon, 0);
 }
 
-static void update_result_text(HWND hdlg, ps_struct_t *ps_struct)
+static void update_result_text(HWND hdlg, const ps_struct_t *ps_struct)
 {
     WCHAR resource_txt[200];
     UINT res_id;