Reset class member variables

[dennis luehring]

> (btw: the need of reseting an object could be a design problem)
examples:

1# bad example:

int result[];
auto obj = new TheObject();
for( ... )
{
   result ~= obj.do_some_thing( some_data );
   obj.reset();
}

possible errors: you forgot the .reset() or the reset isn't correct 
implemented

....

2# better, cleaner way:

int result[];
for( ... )
{
   auto obj = new TheObject();
   result ~= obj.do_some_thing( some_data );
}

in this case you don't have to safe/repair your object state
possible errors: none

--- design blabla

the obj.reset is (maybe) an hard optimizing step (if the newing IS 
expensive) or your obj is doing the wrong stuff (in the wrong context?)