version: Constify some variables

[Andrew Talbot]

Changelog:
    version: Constify some variables.

diff -urN a/dlls/version/info.c b/dlls/version/info.c
--- a/dlls/version/info.c	2007-03-01 17:51:29.000000000 +0000
+++ b/dlls/version/info.c	2007-03-03 20:42:40.000000000 +0000
@@ -238,7 +238,7 @@
  */
 static DWORD VERSION_GetFileVersionInfo_PE( LPCWSTR filename, DWORD datasize, LPVOID data )
 {
-    VS_FIXEDFILEINFO *vffi;
+    const VS_FIXEDFILEINFO *vffi;
     DWORD len;
     BYTE *buf;
     HMODULE hModule;
@@ -313,7 +313,7 @@
  */
 static DWORD VERSION_GetFileVersionInfo_16( LPCSTR filename, DWORD datasize, LPVOID data )
 {
-    VS_FIXEDFILEINFO *vffi;
+    const VS_FIXEDFILEINFO *vffi;
     DWORD len, offset;
     BYTE *buf;
     HMODULE16 hModule;