CICD: Update the MXE Version Used to Build the Windows Version.

This fixes the missing 'Print' functionality in Windows.

Signed-off-by: Michael Keller <github@ike.ch>

.github/workflows/windows-mxe-dockerimage.yml

@@ -12,8 +12,9 @@ jobs:
   windows-mxe:
     runs-on: ubuntu-latest
     env:
-      VERSION: ${{ '3.3.0' }}    # 'official' images should have a dot-zero version
-      mxe_sha: '974808c2ecb02866764d236fe533ae57ba342e7a'
+      VERSION: ${{ '3.4.0' }}    # 'official' images should have a dot-zero version
+      # Fix this here as QTWebKit (needed for printing) is broken in newer versions
+      mxe_sha: 'd6377b2f2334694dbb040294fd0d848327e63328'
 
     steps:
     - uses: actions/checkout@v4

scripts/docker/mxe-build-container/Dockerfile

@@ -1,7 +1,10 @@
 # Build the image using the --build-arg option, e.g.:
 # docker build -t boret/myimage:0.1 --build-arg=mxe_sha=123ABC456 .
 
-FROM ubuntu:24.04 as base
+# We need to stick with 22.04 for now because the latest MXE version
+# (db430dc676e6f5d77604af150b8acc1403af4fd7) does not build a working
+# version of QtWebKit, which breaks printing in Subsurface.
+FROM ubuntu:22.04 as base
 
 # update and set up the packages we need for the build
 RUN apt-get update  &&  \
@@ -54,8 +57,9 @@ RUN apt-get install -y \
     xz-utils \
     scons
 
-# very often master is broken, so we pass in a known good SHA
-ARG mxe_sha=d6377b2f2334694dbb040294fd0d848327e63328
+# Default to 'master' if no build argument is passed in
+ARG mxe_sha=master
+# Very often master is broken, so we pass in a known good SHA
 ENV _ver=${mxe_sha}
 
 WORKDIR /win