IDL43 — Restrict bitshifts

Currently the spec says:

The << binary operator indicates that the value of the left operand shall be shifted left the number of bits specified by the right operand, with 0 fill for the vacated bits. The right operand shall be in the range 0 <= right operand < 64.•The >> binary operator indicates that the value of the left operand shall be shifted right the number of bits specified by the right operand, with 0 fill for the vacated bits. The right operand shall be in the range 0 <= right operand < 64

But this should be more restricted, the range should be dependent on the number of bits of the underlying type, when it is for example a 32bit long, the operand should be in the range of 0 <= 32