msi: Constify some variables

[Andrew Talbot]

Changelog:
    msi: Constify some variables.

diff -urN a/dlls/msi/appsearch.c b/dlls/msi/appsearch.c
--- a/dlls/msi/appsearch.c	2007-05-10 17:30:53.000000000 +0100
+++ b/dlls/msi/appsearch.c	2007-05-31 21:25:47.000000000 +0100
@@ -474,7 +474,7 @@
  * Return ERROR_SUCCESS in case of success (whether or not the file matches),
  * something else if an install-halting error occurs.
  */
-static UINT ACTION_FileVersionMatches(MSISIGNATURE *sig, LPCWSTR filePath,
+static UINT ACTION_FileVersionMatches(const MSISIGNATURE *sig, LPCWSTR filePath,
  BOOL *matches)
 {
     UINT rc = ERROR_SUCCESS;
@@ -549,8 +549,8 @@
  * Return ERROR_SUCCESS in case of success (whether or not the file matches),
  * something else if an install-halting error occurs.
  */
-static UINT ACTION_FileMatchesSig(MSISIGNATURE *sig,
- LPWIN32_FIND_DATAW findData, LPCWSTR fullFilePath, BOOL *matches)
+static UINT ACTION_FileMatchesSig(const MSISIGNATURE *sig,
+ const WIN32_FIND_DATAW *findData, LPCWSTR fullFilePath, BOOL *matches)
 {
     UINT rc = ERROR_SUCCESS;
 
diff -urN a/dlls/msi/classes.c b/dlls/msi/classes.c
--- a/dlls/msi/classes.c	2006-10-10 19:20:06.000000000 +0100
+++ b/dlls/msi/classes.c	2007-05-31 21:26:06.000000000 +0100
@@ -735,7 +735,7 @@
     mime->InstallMe = TRUE;
 }
 
-static UINT register_appid(MSIAPPID *appid, LPCWSTR app )
+static UINT register_appid(const MSIAPPID *appid, LPCWSTR app )
 {
     static const WCHAR szAppID[] = { 'A','p','p','I','D',0 };
     static const WCHAR szRemoteServerName[] =
@@ -965,7 +965,7 @@
     return rc;
 }
 
-static LPCWSTR get_clsid_of_progid( MSIPROGID *progid )
+static LPCWSTR get_clsid_of_progid( const MSIPROGID *progid )
 {
     while (progid)
     {
@@ -976,7 +976,7 @@
     return NULL;
 }
 
-static UINT register_progid( MSIPROGID* progid )
+static UINT register_progid( const MSIPROGID* progid )
 {
     static const WCHAR szCLSID[] = { 'C','L','S','I','D',0 };
     static const WCHAR szDefaultIcon[] =
@@ -1048,7 +1048,7 @@
 }
 
 static UINT register_verb(MSIPACKAGE *package, LPCWSTR progid, 
-                MSICOMPONENT* component, MSIEXTENSION* extension,
+                MSICOMPONENT* component, const MSIEXTENSION* extension,
                 MSIVERB* verb, INT* Sequence )
 {
     LPWSTR keyname;
diff -urN a/dlls/msi/cond.y b/dlls/msi/cond.y
--- a/dlls/msi/cond.y	2006-12-14 20:25:01.000000000 +0000
+++ b/dlls/msi/cond.y	2007-05-31 21:32:22.000000000 +0100
@@ -56,8 +56,8 @@
     INT len;
 };
 
-static LPWSTR COND_GetString( struct cond_str *str );
-static LPWSTR COND_GetLiteral( struct cond_str *str );
+static LPWSTR COND_GetString( const struct cond_str *str );
+static LPWSTR COND_GetLiteral( const struct cond_str *str );
 static int cond_lex( void *COND_lval, COND_input *info);
 static const WCHAR szEmpty[] = { 0 };
 
@@ -678,7 +678,7 @@
     return rc;
 }
 
-static LPWSTR COND_GetString( struct cond_str *str )
+static LPWSTR COND_GetString( const struct cond_str *str )
 {
     LPWSTR ret;
 
@@ -692,7 +692,7 @@
     return ret;
 }
 
-static LPWSTR COND_GetLiteral( struct cond_str *str )
+static LPWSTR COND_GetLiteral( const struct cond_str *str )
 {
     LPWSTR ret;
 
diff -urN a/dlls/msi/custom.c b/dlls/msi/custom.c
--- a/dlls/msi/custom.c	2007-05-30 17:21:38.000000000 +0100
+++ b/dlls/msi/custom.c	2007-05-31 22:12:36.000000000 +0100
@@ -124,7 +124,7 @@
 /* stores the CustomActionData before the action:
  *     [CustomActionData]Action
  */
-static LPWSTR msi_get_deferred_action(LPCWSTR action, LPWSTR actiondata)
+static LPWSTR msi_get_deferred_action(LPCWSTR action, LPCWSTR actiondata)
 {
     LPWSTR deferred;
     DWORD len;
@@ -981,7 +981,7 @@
     return wait_process_handle(package, type, info.hProcess, action);
 }
 
-static DWORD WINAPI ACTION_CallScript( const LPGUID guid )
+static DWORD WINAPI ACTION_CallScript( const GUID *guid )
 {
     msi_custom_action_info *info;
     MSIHANDLE hPackage;
@@ -1200,7 +1200,7 @@
     return wait_thread_handle( info );
 }
 
-void ACTION_FinishCustomActions(MSIPACKAGE* package)
+void ACTION_FinishCustomActions(const MSIPACKAGE* package)
 {
     struct list *item;
     HANDLE *wait_handles;
diff -urN a/dlls/msi/msipriv.h b/dlls/msi/msipriv.h
--- a/dlls/msi/msipriv.h	2007-05-30 17:21:38.000000000 +0100
+++ b/dlls/msi/msipriv.h	2007-05-31 22:10:10.000000000 +0100
@@ -726,7 +726,7 @@
 /* action related functions */
 extern UINT ACTION_PerformAction(MSIPACKAGE *package, const WCHAR *action, BOOL force);
 extern UINT ACTION_PerformUIAction(MSIPACKAGE *package, const WCHAR *action);
-extern void ACTION_FinishCustomActions( MSIPACKAGE* package);
+extern void ACTION_FinishCustomActions( const MSIPACKAGE* package);
 extern UINT ACTION_CustomAction(MSIPACKAGE *package,const WCHAR *action, BOOL execute);
 
 static inline void msi_feature_set_state( MSIFEATURE *feature, INSTALLSTATE state )