wolf4sdl: (qol) fix check for game data

Check for `vswap.sd1` file, as per docs, instead of `.sod` before downloading shareware.

Automatically rename `.sod` files if exist.

scriptmodules/ports/wolf4sdl.sh

@@ -87,7 +87,12 @@ function game_data_wolf4sdl() {
         # Get shareware game data
         downloadAndExtract "http://maniacsvault.net/ecwolf/files/shareware/wolf3d14.zip" "$romdir/ports/wolf3d" -j -LL
     fi
-    if [[ ! -f "$romdir/ports/wolf3d/vswap.sdm" && ! -f "$romdir/ports/wolf3d/vswap.sod" ]]; then
+
+    for sodfile in gamemaps maphead vswap; do
+        [[ -f "$romdir/ports/wolf3d/$sodfile.sod" ]] && mv "$romdir/ports/wolf3d/$sodfile.sod" "$romdir/ports/wolf3d/$sodfile.sd1"
+    done
+
+    if [[ ! -f "$romdir/ports/wolf3d/vswap.sdm" && ! -f "$romdir/ports/wolf3d/vswap.sd1" ]]; then
         cd "$__tmpdir"
         # Get shareware game data
         downloadAndExtract "http://maniacsvault.net/ecwolf/files/shareware/soddemo.zip" "$romdir/ports/wolf3d" -j -LL