fix geos exuctor helpers not handling constant nulls #23

Job	Run time
Build extension binaries / Generate matrix	22s
Build extension binaries / Windows (windows_amd64, x64-windows-static-md)	15m 27s
Build extension binaries / Linux (linux_amd64, ubuntu:18.04, x64-linux)	15m 20s
Build extension binaries / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	15m 18s
Build extension binaries / MacOS (osx_amd64, x86_64, x64-osx)	15m 28s
Build extension binaries / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	15m 26s
Build extension binaries / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	15m 20s
Build extension binaries / MacOS (osx_arm64, arm64, arm64-osx)	15m 30s
Build extension binaries / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	15m 36s
Build extension binaries / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	15m 36s
Deploy extension binaries	1s
	2h 19m 24s

Provide feedback