ntdll: Constify some variables

[Andrew Talbot]

Changelog:
    ntdll: Constify some variables.

diff -urN a/dlls/ntdll/ntdll_misc.h b/dlls/ntdll/ntdll_misc.h
--- a/dlls/ntdll/ntdll_misc.h	2007-05-23 21:55:15.000000000 +0100
+++ b/dlls/ntdll/ntdll_misc.h	2007-06-25 19:56:23.000000000 +0100
@@ -63,7 +63,7 @@
 extern void DECLSPEC_NORETURN server_abort_thread( int status );
 extern sigset_t server_block_set;
 extern void server_enter_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset );
-extern void server_leave_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset );
+extern void server_leave_uninterrupted_section( RTL_CRITICAL_SECTION *cs, const sigset_t *sigset );
 extern int server_remove_fd_from_cache( obj_handle_t handle );
 extern int server_get_unix_fd( obj_handle_t handle, unsigned int access, int *unix_fd,
                                int *needs_close, enum server_fd_type *type, unsigned int *options );
diff -urN a/dlls/ntdll/serial.c b/dlls/ntdll/serial.c
--- a/dlls/ntdll/serial.c	2007-01-03 11:38:47.000000000 +0000
+++ b/dlls/ntdll/serial.c	2007-06-25 19:55:04.000000000 +0100
@@ -1097,7 +1097,7 @@
     return status;
 }
 
-static NTSTATUS xmit_immediate(HANDLE hDevice, int fd, char* ptr)
+static NTSTATUS xmit_immediate(HANDLE hDevice, int fd, const char* ptr)
 {
     /* FIXME: not perfect as it should bypass the in-queue */
     WARN("(%p,'%c') not perfect!\n", hDevice, *ptr);
diff -urN a/dlls/ntdll/server.c b/dlls/ntdll/server.c
--- a/dlls/ntdll/server.c	2007-05-23 21:55:15.000000000 +0100
+++ b/dlls/ntdll/server.c	2007-06-25 19:55:32.000000000 +0100
@@ -339,7 +339,7 @@
 /***********************************************************************
  *           server_leave_uninterrupted_section
  */
-void server_leave_uninterrupted_section( RTL_CRITICAL_SECTION *cs, sigset_t *sigset )
+void server_leave_uninterrupted_section( RTL_CRITICAL_SECTION *cs, const sigset_t *sigset )
 {
     RtlLeaveCriticalSection( cs );
     pthread_functions.sigprocmask( SIG_SETMASK, sigset, NULL );
diff -urN a/dlls/ntdll/tape.c b/dlls/ntdll/tape.c
--- a/dlls/ntdll/tape.c	2006-11-21 14:15:52.000000000 +0000
+++ b/dlls/ntdll/tape.c	2007-06-25 19:56:33.000000000 +0100
@@ -97,7 +97,7 @@
 /******************************************************************
  *      TAPE_CreatePartition
  */
-static NTSTATUS TAPE_CreatePartition( int fd, TAPE_CREATE_PARTITION *data )
+static NTSTATUS TAPE_CreatePartition( int fd, const TAPE_CREATE_PARTITION *data )
 {
 #ifdef HAVE_SYS_MTIO_H
     struct mtop cmd;
@@ -139,7 +139,7 @@
 /******************************************************************
  *      TAPE_Erase
  */
-static NTSTATUS TAPE_Erase( int fd, TAPE_ERASE *data )
+static NTSTATUS TAPE_Erase( int fd, const TAPE_ERASE *data )
 {
 #ifdef HAVE_SYS_MTIO_H
     struct mtop cmd;
@@ -300,7 +300,7 @@
 /******************************************************************
  *      TAPE_Prepare
  */
-static NTSTATUS TAPE_Prepare( int fd, TAPE_PREPARE *data )
+static NTSTATUS TAPE_Prepare( int fd, const TAPE_PREPARE *data )
 {
 #ifdef HAVE_SYS_MTIO_H
     struct mtop cmd;
@@ -353,7 +353,7 @@
 /******************************************************************
  *      TAPE_SetDriveParams
  */
-static NTSTATUS TAPE_SetDriveParams( int fd, TAPE_SET_DRIVE_PARAMETERS *data )
+static NTSTATUS TAPE_SetDriveParams( int fd, const TAPE_SET_DRIVE_PARAMETERS *data )
 {
 #if defined(HAVE_SYS_MTIO_H) && defined(MTCOMPRESSION)
     struct mtop cmd;
@@ -379,7 +379,7 @@
 /******************************************************************
  *      TAPE_SetMediaParams
  */
-static NTSTATUS TAPE_SetMediaParams( int fd, TAPE_SET_MEDIA_PARAMETERS *data )
+static NTSTATUS TAPE_SetMediaParams( int fd, const TAPE_SET_MEDIA_PARAMETERS *data )
 {
 #ifdef HAVE_SYS_MTIO_H
     struct mtop cmd;
@@ -399,7 +399,7 @@
 /******************************************************************
  *      TAPE_SetPosition
  */
-static NTSTATUS TAPE_SetPosition( int fd, TAPE_SET_POSITION *data )
+static NTSTATUS TAPE_SetPosition( int fd, const TAPE_SET_POSITION *data )
 {
 #ifdef HAVE_SYS_MTIO_H
     struct mtop cmd;
@@ -470,7 +470,7 @@
 /******************************************************************
  *      TAPE_WriteMarks
  */
-static NTSTATUS TAPE_WriteMarks( int fd, TAPE_WRITE_MARKS *data )
+static NTSTATUS TAPE_WriteMarks( int fd, const TAPE_WRITE_MARKS *data )
 {
 #ifdef HAVE_SYS_MTIO_H
     struct mtop cmd;