handle operator functions redone to 1) not crash with null handles and 2) not assert when wrong type of handle given to pfield code.
handle operator functions redone to 1) not crash with null handles and 2) not assert when wrong type of handle given to pfield code.

RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix,RTcmix/RTcmix