size optimization

it's official. even msdn now says SHGetMalloc returns the same allocator CoTaskMemFree uses and a little debugging backs this even on Windows 95


git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@4978 212acab6-be3b-0410-9dea-997c60f758d6

Source/exehead/Ui.c

@@ -951,7 +951,7 @@ static BOOL CALLBACK DirProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lPar
       if (idlist)
       {
         // free idlist
-        FreePIDL(idlist);
+        CoTaskMemFree(idlist);
 
         addtrailingslash(dir);