advapi32: Constify some variables (3 of 3)

[Andrew Talbot]

Changelog:
    advapi32: Constify some variables (3 of 3).

diff -urN a/dlls/advapi32/service.c b/dlls/advapi32/service.c
--- a/dlls/advapi32/service.c	2007-03-01 17:36:03.000000000 +0000
+++ b/dlls/advapi32/service.c	2007-03-10 12:08:53.000000000 +0000
@@ -276,7 +276,7 @@
 }
 
 static inline LONG service_write_values( HKEY hKey,
-                                         struct reg_value *val, int n )
+                                         const struct reg_value *val, int n )
 {
     LONG r = ERROR_SUCCESS;
     int i;
@@ -294,7 +294,7 @@
 /******************************************************************************
  * Service IPC functions
  */
-static LPWSTR service_get_pipe_name(LPWSTR service)
+static LPWSTR service_get_pipe_name(LPCWSTR service)
 {
     static const WCHAR prefix[] = { '\\','\\','.','\\','p','i','p','e','\\',
                    '_','_','w','i','n','e','s','e','r','v','i','c','e','_',0};
@@ -308,7 +308,7 @@
     return name;
 }
 
-static HANDLE service_open_pipe(LPWSTR service)
+static HANDLE service_open_pipe(LPCWSTR service)
 {
     LPWSTR szPipe = service_get_pipe_name( service );
     HANDLE handle = INVALID_HANDLE_VALUE;
@@ -329,7 +329,7 @@
 /******************************************************************************
  * service_get_event_handle
  */
-static HANDLE service_get_event_handle(LPWSTR service)
+static HANDLE service_get_event_handle(LPCWSTR service)
 {
     static const WCHAR prefix[] = { 
            '_','_','w','i','n','e','s','e','r','v','i','c','e','_',0};