Some Win64 issues

I ran some additional tests with Win64 libs and found that

1) dx_mreciottdata causes access violation (adrr 0x0000000) right after its execution. 32 bit version works fine. rtflog: no errors.

2) dcb_open("dcbB1", 0) returns -1. 32 bit version works fine. rtflog: 04/15/2019 07:22:20.795   6064       11732 dm3low                  EXCE         Exception at LibDm3Dti.cpp:580 (0x6001)