[Assembler] ICE due to invalid deposit

```
library L {
function f0(int8 i0) public {
assembly {
codecopy(add(0x0,mod(3, 4)),7, mod(i0,1))
function af0(i1, i2, i3, i4) ->
o1, o2, o3, o4, o5, o6, o7, o8, o9, o10, o11, o12, o13, o14, o15, o16, o17
{}
}
}
}
```

throws

https://github.com/ethereum/solidity/blob/311b2054afae02bfaa8521fd94475a06e0669025/libevmasm/Assembly.h#L108

Repro

```
$ solc --ir-optimized test.sol --asm --optimize
Uncaught exception:
/solidity/libevmasm/Assembly.h(108): Throw in function void solidity::evmasm::Assembly::adjustDeposit(int)
Dynamic exception type: boost::wrapexcept
std::exception::what: InvalidDeposit
[solidity::util::tag_comment*] = Assertion failed
```

Reproduce the failure with the provided Solidity source and the `solc --ir-optimized test.sol --asm --optimize` command. Start at `libevmasm/Assembly.h:108`, where `Assembly::adjustDeposit` throws `InvalidDeposit`; done means this input no longer causes an uncaught exception.

Written by the indexing model from the issue text.