Delete ALLUSERS property merged from CRT merge module, so that per-user installations become possible again.

Tools/msi/merge.py

@@ -65,6 +65,11 @@ def merge(msi, feature, rootdir, modules):
         msilib.add_stream(db, stream,  cabname)
         os.unlink(cabname)
         maxmedia += count
+    # The merge module sets ALLUSERS to 1 in the property table. 
+    # This is undesired; delete that
+    v = db.OpenView("DELETE FROM Property WHERE Property='ALLUSERS'")
+    v.Execute(None)
+    v.Close()
     db.Commit()
 
 merge(msi, "SharedCRT", "TARGETDIR", modules)