61f8298 rpc: Adjust ifdef to avoid unreachable code (practicalswift)
Pull request description:
Adjust `ifdef` to avoid unreachable code. Introduced in 1e79c055cd30d21ba5f8c7f81ef911d5d4e295a8.
Tree-SHA512: c775cc9181e4034f26c5b219974e06886435275933249b169d2bc8bc98f639c4027e1e7d991f43bded62146a141acee6d3be1f2b313042d9bbc0a5d2e71d6c7c
Backport of Core PR12787
https://github.com/bitcoin/bitcoin/pull/12787/