shell32: Constify some variables

[Andrew Talbot]

Changelog:
    shell32: Constify some variables.

diff -urN a/dlls/shell32/shelllink.c b/dlls/shell32/shelllink.c
--- a/dlls/shell32/shelllink.c	2007-06-29 14:17:08.000000000 +0100
+++ b/dlls/shell32/shelllink.c	2007-09-12 21:54:19.000000000 +0100
@@ -198,7 +198,7 @@
     return (IShellLinkImpl *)((char*)iface - FIELD_OFFSET(IShellLinkImpl, lpvtblObjectWithSite));
 }
 
-static HRESULT ShellLink_UpdatePath(LPWSTR sPathRel, LPCWSTR path, LPCWSTR sWorkDir, LPWSTR* psPath);
+static HRESULT ShellLink_UpdatePath(LPCWSTR sPathRel, LPCWSTR path, LPCWSTR sWorkDir, LPWSTR* psPath);
 
 /* strdup on the process heap */
 static inline LPWSTR HEAP_strdupAtoW( HANDLE heap, DWORD flags, LPCSTR str)
@@ -656,7 +656,7 @@
     return TRUE;
 }
 
-static LPWSTR Stream_LoadPath( LPSTR p, DWORD maxlen )
+static LPWSTR Stream_LoadPath( LPCSTR p, DWORD maxlen )
 {
     int len = 0, wlen;
     LPWSTR path;
@@ -1216,7 +1216,7 @@
  *  ShellLink_UpdatePath
  *	update absolute path in sPath using relative path in sPathRel
  */
-static HRESULT ShellLink_UpdatePath(LPWSTR sPathRel, LPCWSTR path, LPCWSTR sWorkDir, LPWSTR* psPath)
+static HRESULT ShellLink_UpdatePath(LPCWSTR sPathRel, LPCWSTR path, LPCWSTR sWorkDir, LPWSTR* psPath)
 {
     if (!path || !psPath)
 	return E_INVALIDARG;
@@ -1510,7 +1510,8 @@
     return NOERROR;
 }
 
-static HRESULT SHELL_PidlGeticonLocationA(IShellFolder* psf, LPITEMIDLIST pidl, LPSTR pszIconPath, int cchIconPath, int* piIcon)
+static HRESULT SHELL_PidlGeticonLocationA(IShellFolder* psf, LPCITEMIDLIST pidl,
+                                          LPSTR pszIconPath, int cchIconPath, int* piIcon)
 {
     LPCITEMIDLIST pidlLast;
 
@@ -1888,7 +1889,8 @@
     return S_OK;
 }
 
-static HRESULT SHELL_PidlGeticonLocationW(IShellFolder* psf, LPITEMIDLIST pidl, LPWSTR pszIconPath, int cchIconPath, int* piIcon)
+static HRESULT SHELL_PidlGeticonLocationW(IShellFolder* psf, LPCITEMIDLIST pidl,
+                                          LPWSTR pszIconPath, int cchIconPath, int* piIcon)
 {
     LPCITEMIDLIST pidlLast;
 
@@ -2123,7 +2125,7 @@
     return S_OK;
 }
 
-static BOOL ShellLink_GetVolumeInfo(LPWSTR path, volume_info *volume)
+static BOOL ShellLink_GetVolumeInfo(LPCWSTR path, volume_info *volume)
 {
     const int label_sz = sizeof volume->label/sizeof volume->label[0];
     WCHAR drive[4] = { path[0], ':', '\\', 0 };
diff -urN a/dlls/shell32/shellole.c b/dlls/shell32/shellole.c
--- a/dlls/shell32/shellole.c	2007-07-06 19:00:20.000000000 +0100
+++ b/dlls/shell32/shellole.c	2007-09-12 21:35:07.000000000 +0100
@@ -284,7 +284,7 @@
 	TRACE("(%p(%s) %p)\n", clsid, debugstr_w(clsid), id);
 	return CLSIDFromString((LPWSTR)clsid, id);
 }
-DWORD WINAPI SHCLSIDFromStringAW (LPVOID clsid, CLSID *id)
+DWORD WINAPI SHCLSIDFromStringAW (LPCVOID clsid, CLSID *id)
 {
 	if (SHELL_OsIsUnicode())
 	  return SHCLSIDFromStringW (clsid, id);
diff -urN a/dlls/shell32/shellord.c b/dlls/shell32/shellord.c
--- a/dlls/shell32/shellord.c	2007-09-10 20:13:03.000000000 +0100
+++ b/dlls/shell32/shellord.c	2007-09-12 21:34:58.000000000 +0100
@@ -609,7 +609,7 @@
  * RETURNS
  *   position within MRU list that data was added.
  */
-static INT SHADD_create_add_mru_data(HANDLE mruhandle, LPSTR doc_name, LPSTR new_lnk_name,
+static INT SHADD_create_add_mru_data(HANDLE mruhandle, LPCSTR doc_name, LPCSTR new_lnk_name,
                                      LPSTR buffer, INT *len)
 {
     LPSTR ptr;