remove memory leaks
now array.c and the memory handling part of indicators.c should (3x on wood) be free of memory leaks, so the hard part is done. However meanwhile throughout all modules I added a bazzillion arrays, arrays of struct of something and bstrings. Should be pretty easy to clean, just a lot of stupid work.
former text: enhance indicators.c's destroy_indicator() to really free all allocated memory. Hunt down all existing memory leaks (valgrind hates me).