Populate empty data field

[thomaspanf]

Fix for this segfault.

~ $ rocketpool m rd

This command will allow you to manually deposit the remaining ETH for any dissolved minipools, activating them so you can exit them and retrieve your minipool's funds.
Please read our guide at https://docs.rocketpool.net/guides/node/rescue-dissolved.html to fully read about the process before continuing.

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x5c4458]

goroutine 1 [running]:
math/big.(*Int).Cmp(0x4040000000000000?, 0x109f874?)
    math/big/int.go:381 +0x18
github.com/rocket-pool/smartnode/v2/rocketpool-cli/commands/minipool.rescueDissolved(0xc0005b4ec0)
    github.com/rocket-pool/smartnode/v2/rocketpool-cli/commands/minipool/rescue-dissolved.go:77 +0x539
github.com/rocket-pool/smartnode/v2/rocketpool-cli/commands/minipool.RegisterCommands.func16(0xc0005b4ec0)
[9:24 PM]

[github-actions]

Coverage Report

[github-actions]

Merging this branch will not change overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/rocket-pool/smartnode/v2/rocketpool-daemon/api/minipool	0.00% (ø)

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/rocket-pool/smartnode/v2/rocketpool-daemon/api/minipool/rescue-dissolved-details.go	0.00% (ø)	287	0	287

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.