on earlier perls like 5.20
+13Apr24======================================================================
+1. Fix small issue with perl 5.20 (and possibly earlier) compilation.
27Mar24======================================================================
1. Fix dupe PC[16]1 (spot) coming in "too fast" for dupe filter to work.
27Mar24======================================================================
1. Fix dupe PC[16]1 (spot) coming in "too fast" for dupe filter to work.