Fix iterator past end of vector #2505

	name: Build with GnuTLS
	on:
	push:
	branches:
	- master
	pull_request:
	jobs:
	build-linux:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: install packages
	run: sudo apt update && sudo apt install libgnutls28-dev nettle-dev libsrtp2-dev
	- name: submodules
	run: git submodule update --init --recursive --depth 1
	- name: cmake
	run: cmake -B build -DUSE_GNUTLS=1 -DUSE_SYSTEM_SRTP=1 -DWARNINGS_AS_ERRORS=1
	- name: make
	run: (cd build; make -j2)
	- name: test
	run: ./build/tests
	build-macos:
	runs-on: macos-latest
	steps:
	- uses: actions/checkout@v2
	- name: install packages
	run: brew install gnutls nettle
	- name: submodules
	run: git submodule update --init --recursive --depth 1
	- name: cmake
	run: cmake -B build -DUSE_GNUTLS=1 -DWARNINGS_AS_ERRORS=1 -DENABLE_LOCAL_ADDRESS_TRANSLATION=1
	- name: make
	run: (cd build; make -j2)
	- name: test
	run: ./build/tests

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