Fix compilation with Carla 2.4.3

[PhysSong]

Replaces #6397.
Include CarlaDefines.h before using CARLA_VERSION_HEX to prevent hitting wrong preprocessor path.

Note that if we bump up Carla version requirement to 1.9.11=2.0-RC1, the #else part is not required.

[LmmsBot]

🤖 Hey, I'm @LmmsBot from github.com/lmms/bot and I made downloads for this pull request, click me to make them magically appear! 🎩

Linux

• Linux (AppImage): lmms-1.2.3-939+g9c49a7747-linux-x86_64.AppImage (build link)

Windows

• Windows 32-bit: lmms-1.2.3-939+g9c49a7747-mingw-win32.exe (build link)
• Windows 64-bit: lmms-1.2.3-939+g9c49a7747-mingw-win64.exe (build link)
• Windows 32-bit: lmms-1.3.0-alpha-msvc2017-win32.exe (build link)
• Windows 64-bit: lmms-1.3.0-alpha-msvc2017-win64.exe (build link)

macOS

• macOS : lmms-1.2.3-939+g9c49a7747-mac10.14.dmg (build link)

🤖

{"platform_name_to_artifacts": {"Linux": [{"artifact": {"title": {"title": "(AppImage)", "platform_name": "Linux"}, "link": {"link": "https://output.circle-artifacts.com/output/job/abef3c84-9c86-42ee-a5d9-c4d918121198/artifacts/0/lmms-1.2.3-939+g9c49a7747-linux-x86_64.AppImage"}}, "build_link": "https://circleci.com/gh/PhysSong/lmms/1385?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link"}], "Windows": [{"artifact": {"title": {"title": "32-bit", "platform_name": "Windows"}, "link": {"link": "https://output.circle-artifacts.com/output/job/6120b7b7-b30a-4f12-8103-39220c9f46f6/artifacts/0/lmms-1.2.3-939+g9c49a7747-mingw-win32.exe"}}, "build_link": "https://circleci.com/gh/PhysSong/lmms/1382?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link"}, {"artifact": {"title": {"title": "64-bit", "platform_name": "Windows"}, "link": {"link": "https://output.circle-artifacts.com/output/job/035c41b0-f206-477b-bb45-2a2b5e8b46dd/artifacts/0/lmms-1.2.3-939+g9c49a7747-mingw-win64.exe"}}, "build_link": "https://circleci.com/gh/PhysSong/lmms/1381?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link"}, {"artifact": {"title": {"title": "32-bit", "platform_name": "Windows"}, "link": {"link": "https://ci.appveyor.com/api/buildjobs/ss9cv2q22x50es7l/artifacts/build/lmms-1.3.0-alpha-msvc2017-win32.exe"}}, "build_link": "https://ci.appveyor.com/project/Lukas-W/lmms/builds/43477914"}, {"artifact": {"title": {"title": "64-bit", "platform_name": "Windows"}, "link": {"link": "https://ci.appveyor.com/api/buildjobs/i7mnmi9lqkx7lh11/artifacts/build/lmms-1.3.0-alpha-msvc2017-win64.exe"}}, "build_link": "https://ci.appveyor.com/project/Lukas-W/lmms/builds/43477914"}], "macOS": [{"artifact": {"title": {"title": "", "platform_name": "macOS"}, "link": {"link": "https://output.circle-artifacts.com/output/job/9154a2d7-4259-41c5-975c-15270cc532e8/artifacts/0/lmms-1.2.3-939+g9c49a7747-mac10.14.dmg"}}, "build_link": "https://circleci.com/gh/PhysSong/lmms/1384?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link"}]}, "commit_sha": "9c49a7747c38ac0a3dd1c21d30019a830155d500"}