Avoid a loop where a parent's parent refers to itself as its parent.

dlls/msi/action.c

@@ -4563,8 +4563,7 @@ static INT load_progid(MSIPACKAGE* package, MSIRECORD *row)
         package->progids[index].ParentIndex != index)
     {
         int pindex = package->progids[index].ParentIndex;
-        while (package->progids[pindex].ParentIndex>= 0 && 
-               package->progids[pindex].ParentIndex != pindex)
+        while (package->progids[pindex].ParentIndex>= 0)
             pindex = package->progids[pindex].ParentIndex;
 
         FIXME("BAD BAD need to determing if we are really the CurVer\n");