* src/rdd/dbf1.c
+ added support for autoincrement fields with counter longer then 4 bytes
Warning: if someone created tables with such fields i.e. { "I:+", 8, 0 }
after my modification which added support for AutoInc flags in
all numeric DBF fields then he should update counters manually
using DBS_COUNTER flag. New code uses 64bit counters for such
field located in different part of DBFFIELD structure.