64bit returns an int, not a bool, thus 64bit not is not what you expect:
it's a bitwise negation, not a logic negation of 64bit return value

dia_bits.inc defines bits.suffix which tells us which suffix to prepend
to entry names depending on the value of the "bits" menu and of the
current CD and the current CPU. Fix definition of this value so that
it's always correct, and use it when building entry names.