building unstable
Fixes after checking source with clang

* isl/paramd/svg_generator.cc: missing options in switch (PT_YEAR, PT_SEC10)

* isl/paramd/{tree_processon.cc, param_tree.c}: support for new libxml2 buffer API

* libSzarp/date.cc: clang warning about fprint without format string

* libSzarp2/ipk/tparam.cc: clang warning about string encoding

* libSzarp2/szbase/definablecalculate.cc: fixed returning NULL as double
building unstable