Change if statements in autoip.c to fix compiler warnings #123

	name: CI

	on:
	push:
	branches: [master]
	pull_request:
	branches: '*'

	jobs:
	build:
	strategy:
	matrix:
	compiler: [gcc, clang]
	env:
	CC: ${{ matrix.compiler }}
	LSAN_OPTIONS: verbosity=1:log_threads=1
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- name: Install deps
	run: sudo apt-get install check ninja-build doxygen

	- name: Copy lwipcfg.h for example app
	run: cp contrib/examples/example_app/lwipcfg.h.ci contrib/examples/example_app/lwipcfg.h

	- name: Build unit tests with make
	run: make -C contrib/ports/unix/check
	- name: Run unit tests
	run: make -C contrib/ports/unix/check check

	- name: Run cmake
	run: mkdir build && cd build && cmake .. -G Ninja
	- name: Build with cmake
	run: cd build && cmake --build .
	- name: Build docs with cmake
	run: cd build && cmake --build . --target lwipdocs

	- name: Validate combinations of options
	run: cd contrib/ports/unix/example_app && ./iteropts.sh

	- name: Build the default example app
	run: \|
	cp contrib/examples/example_app/lwipcfg.h.example contrib/examples/example_app/lwipcfg.h
	make -C contrib/ports/unix/example_app TESTFLAGS="-Wno-documentation" -j 4

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