Fix Linux Gitea workflow gates

.gitea/workflows/jpeg2000.yml

@@ -7,6 +7,11 @@ on:
 jobs:
   linux:
     runs-on: ubuntu-latest
+    env:
+      # Ubuntu 24.04 also ships an older libopenjp2.so.7. Ensure both
+      # pkg-config and the runtime loader select the audited 2.5.4 install.
+      PKG_CONFIG_PATH: /usr/local/lib/pkgconfig
+      LD_LIBRARY_PATH: /usr/local/lib
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
@@ -19,6 +24,7 @@ jobs:
           cmake --build /tmp/openjpeg-build --parallel
           sudo cmake --install /tmp/openjpeg-build
           sudo ldconfig
+          test "$(pkg-config --modversion libopenjp2)" = "2.5.4"
       - name: Build and test optional feature
         run: |
           cargo test -p libremetaverse-imaging --features jpeg2000