In previous incarnations of the vvp runtime, bit vectors were passed
around as arrays of unsigned char that charried bit4 vectors. That
is no longer used. Remove the last vestiges of that dead code.
Modified the code that deals with real variables to accept an integer
value when using vpi_put_value(). Also added some type of diagnostic
message for all switch defaults that have an assert(0) to indicate an
error condition, removed CVS comments and removed a small section of
unreachable code.