advpack: backup should be a const string

[James Hawkins]

Hi,

Changelog:
* backup should be a const string.

 dlls/advpack/files.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

-- 
James Hawkins
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diff --git a/dlls/advpack/files.c b/dlls/advpack/files.c
index 1d02443..0442d41 100644
--- a/dlls/advpack/files.c
+++ b/dlls/advpack/files.c
@@ -59,7 +59,8 @@ HRESULT WINAPI AddDelBackupEntryA(LPCSTR
                                   LPCSTR lpcszBaseName, DWORD dwFlags)
 {
     UNICODE_STRING backupdir, basename;
-    LPWSTR filelist, backup;
+    LPWSTR filelist;
+    LPCWSTR backup;
     HRESULT res;
 
     TRACE("(%s, %s, %s, %ld)\n", debugstr_a(lpcszFileList),
-- 
1.4.2.1