* nsf.c (ParamOptionParse), nsfInt.h: Provide for own MAX and MIN macros, the ones reused implicitly from Tcl's tommath have vanished in 8.7 branches; and are not provided otherwise, at least in MinGW settings. Fixes 8.7 builds for MinGW under Win.
* nsf.c (ListSuperClasses): Fix refcounting for 8.5 non-threaded only, otherwise the patternString becomes unavailable once a preemptive decrement has been performed, leading to unexpected info results.