Lots of bool operations shouldn't compile

[Don Clugston]

Four examples, although it's only one bug. Almost all operations on bool 
should be disabled, but I found the ones below a little amusing. None of 
them should compile, but they all evaluate as "true".

void main()
{
     if (true >= ireal.nan) { writefln("This is kind of ridiculous"); }
     if (false >= ireal.nan) { writefln("This is kind of ridiculous"); }
     if (true <> -2i) { writefln("NCEG operators too ??!!"); }
     if (false != -2i) { writefln("and again"); }
}