Fix NULL Map dereference in MapIterate

.github/workflows/msbuild.yml

@@ -0,0 +1,106 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: MSBuild
+
+on:
+  push:
+  pull_request:
+
+env:
+  # Path to the solution file relative to the root of the project.
+  SOLUTION_FILE_PATH: build\Incursion.sln
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        configuration: ["Release", "Debug"]
+        platform: ["Win32", "x64"]
+    runs-on: windows-2022
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Add MSBuild to PATH
+        uses: microsoft/setup-msbuild@v2
+
+      - name: Obtain external dependencies
+        run: |
+          pushd dependencies
+          curl -L -O https://github.com/libtcod/libtcod/releases/download/1.7.0/libtcod-1.7.0-${{ matrix.platform == 'Win32' && 'x86' || 'x86_64' }}-msvc.zip
+          7z x libtcod-*.zip
+          popd
+
+      - name: Build
+        # Add additional options to the MSBuild command line here (like platform or verbosity level).
+        # See https://docs.microsoft.com/visualstudio/msbuild/msbuild-command-line-reference
+        run: msbuild /m /p:Configuration=${{matrix.configuration}} /p:Platform=${{matrix.platform}} ${{env.SOLUTION_FILE_PATH}}
+
+      - name: Verify generated files
+        run: git diff --exit-code src/tokens.cpp src/yygram.cpp inc/yygram.h
+
+      - name: Copy binaries to project root
+        shell: bash
+        run: cp -v build/*/*/exe_libtcod/Incursion.exe dependencies/libtcod-*/libtcod.dll dependencies/libtcod-*/SDL2.dll .
+
+      - name: Compile mod
+        if: matrix.configuration == 'Debug'
+        shell: bash
+        run: ./Incursion.exe -compile
+
+      - name: Upload mod
+        if: matrix.configuration == 'Debug'
+        uses: actions/upload-artifact@v4
+        with:
+          name: mod-${{ matrix.platform }}
+          path: mod
+          retention-days: 1
+
+      - name: Upload binaries
+        uses: actions/upload-artifact@v4
+        with:
+          name: direct-binaries-${{matrix.configuration}}-${{matrix.platform}}
+          path: |
+            *.exe
+            *.dll
+          retention-days: 1
+
+  package:
+    needs: [build]
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform: ["Win32", "x64"]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Fetch mod
+        uses: actions/download-artifact@v4
+        with:
+          name: mod-${{ matrix.platform }}
+          path: mod
+      - name: Fetch binaries
+        uses: actions/download-artifact@v4
+        with:
+          name: direct-binaries-Release-${{matrix.platform}}
+          path: .
+      - name: Package Incursion
+        uses: actions/upload-artifact@v4
+        with:
+          name: Incursion-${{matrix.platform}}
+          path: |
+            *.exe
+            *.dll
+            *.md
+            *.txt
+            fonts
+            docs
+            mod
+          retention-days: 30
+          compression-level: 9

.gitignore

@@ -5,6 +5,7 @@
 *.obj
 
 # Windows build & dependencies
+.vs
 build/dependencies
 build/packages
 build/run
@@ -18,6 +19,8 @@ Incursion.opensdf
 # Incursion specific temporary files.
 lib/dispatch.h
 lib/program.i
+Options.dat
+save
 
 # Local nonsense.
 _external