Crashfixes0828

When tried running hcana on machines with gcc version 4.8.3, which is much newer than what we have at JLab,  would crash.  The crashes were in the destructor for various drift chamber classes and were because arrays that had not been initialized were being deleted.  ROOT sometimes calls default creators so it is important to initilize variables in those default creators or make sure that the destructor knows not to try to delete them.   I did enough to get the crashes to go away, but a more careful look at the drift chamber classes and the classes for the other detectors is warranted.