serialui: Replace const pointer type with correct pointer to const

[Andrew Talbot]

Changelog:
    serialui: Replace const pointer type with correct pointer to const.

diff -urN a/dlls/serialui/confdlg.c b/dlls/serialui/confdlg.c
--- a/dlls/serialui/confdlg.c	2007-03-06 17:28:21.000000000 +0000
+++ b/dlls/serialui/confdlg.c	2007-03-08 20:24:35.000000000 +0000
@@ -112,7 +112,7 @@
     DWORD         dwSize;
     LPPARAM2STRDATA data;
 } PARAM2STR, *LPPARAM2STR;
-typedef const LPPARAM2STR LPCPARAM2STR;
+typedef const PARAM2STR *LPCPARAM2STR;
 
 #define SERIALUI_TABLESIZE(x) ((sizeof (x))/(sizeof (x[0])))