- further fixes of inccorect overflow errors for int (and long on LLP64 systems) * prev commit had bugs * added overflow tests for also int, long, long long (for both, lp64 and llp64) - while at it, fixing a reference leak when not using python with utf8 caching

clib = dcLoad("msvcrt")
f = dcFind(clib,"sqrt")

x = dcCall(f,"d)d",144)
io.write("result ",x,"\n")

x = dcCall(f,"d)d",225)
io.write("result ",x,"\n")


f = dc("msvcrt:sqrt(d)d")
f()