adding 'kind flag' to the savegame format so the file can be determined if it contains player or world data

src/net/torvald/terrarum/modulebasegame/serialise/GameSavingThread.kt

@@ -62,6 +62,7 @@ class WorldSavingThread(
     override fun save() {
 
         disk.saveMode = 2 * isAuto.toInt() // no quick
+        disk.saveKind = VDSaveKind.WORLD_DATA
 
         if (hasThumbnail) {
             while (!IngameRenderer.fboRGBexportedLatch) {
@@ -224,6 +225,7 @@ class PlayerSavingThread(
 
     override fun save() {
         disk.saveMode = 2 * isAuto.toInt() // no quick
+        disk.saveKind = VDSaveKind.PLAYER_DATA
         disk.capacity = 0L
 
         WriteSavegame.saveProgress = 0f

src/net/torvald/terrarum/modulebasegame/serialise/QuickSaveThread.kt

@@ -140,9 +140,12 @@ class QuickSingleplayerWorldSavingThread(
         }
 
 
+        disk.saveKind = VDSaveKind.WORLD_DATA
+
         skimmer.rewriteDirectories()
         skimmer.injectDiskCRC(disk.hashCode())
         skimmer.setSaveMode(1 + 2 * isAuto.toInt())
+        skimmer.setSaveKind(VDSaveKind.WORLD_DATA)
 
         printdbg(this, "Game saved with size of ${outFile.length()} bytes")