- optimize SHL MOD INTDIV to use 32-bit operation when result will be converted to U|LONG
- convert 'clng(cint(a<32>) BOP<64> cint(b<32>))' to 'a<32> BOP<32> b<32>'

For example:
    dim as ulong a, b
    var x = a \ b         '' same as before, a & b promoted to integer, returns integer
    var y = culng(a \ b)  '' optimized to use 32-bit division, return ulong

- use this optimization for conversion to U|BYTE and U|SHORT results also
- enabled for x86_64 targets only

- code clean-up of previous commit; compare data type sizes instead of specific data types