mods workflow logic fix

.github/workflows/auto-build.yml

@@ -78,7 +78,7 @@ jobs:
               docker push ghcr.io/gilbn/theme.park:$directory
             done
       - name: manually build
-        if: ${{ github.event.inputs.app != 'build-all-the-mods' }}
+        if: ${{ github.event.inputs.app && github.event.inputs.app != 'build-all-the-mods' }}
         run: |
           docker build docker-mods/${{ github.event.inputs.app }} --tag ghcr.io/gilbn/theme.park:${{ github.event.inputs.app }}${{ github.event.inputs.append-tag }}
           docker push ghcr.io/gilbn/theme.park:${{ github.event.inputs.app }}${{ github.event.inputs.append-tag }}
@@ -124,7 +124,7 @@ jobs:
               docker push gilbn/theme.park:$directory
             done
       - name: manually build
-        if: ${{ github.event.inputs.app != 'build-all-the-mods' }}
+        if: ${{ github.event.inputs.app && github.event.inputs.app != 'build-all-the-mods' }}
         run: |
           docker build docker-mods/${{ github.event.inputs.app }} --tag gilbn/theme.park:${{ github.event.inputs.app }}${{ github.event.inputs.append-tag }}
           docker push gilbn/theme.park:${{ github.event.inputs.app }}${{ github.event.inputs.append-tag }}