fix: user bits and manually set rotation not saving

src/logic/scripting/lua/libblock.cpp

@@ -156,7 +156,7 @@ int l_set_block_rotation(lua_State* L) {
         return 0;
     }
     vox->state.rotation = value;
-    scripting::level->chunks->getChunkByVoxel(x, y, z)->setModified(true);
+    scripting::level->chunks->getChunkByVoxel(x, y, z)->setModifiedAndUnsaved();
     return 0;
 }
 
@@ -182,7 +182,7 @@ int l_set_block_states(lua_State* L) {
     }
     voxel* vox = scripting::level->chunks->get(x, y, z);
     vox->state = int2blockstate(states);
-    chunk->setModified(true);
+    chunk->setModifiedAndUnsaved();
     return 0;
 }
 
@@ -214,12 +214,17 @@ int l_set_block_user_bits(lua_State* L) {
     size_t mask = ((1 << bits) - 1) << offset;
     lua_Integer value = (lua_tointeger(L, 6) << offset) & mask;
     
+    Chunk* chunk = scripting::level->chunks->getChunkByVoxel(x, y, z);
+    if (chunk == nullptr) {
+        return 0;
+    }
     voxel* vox = scripting::level->chunks->get(x, y, z);
     if (vox == nullptr) {
         return 0;
     }
     vox->state.userbits = (vox->state.userbits & (~mask)) | value;
-    return 0;
+    chunk->setModifiedAndUnsaved();
+    return 0; 
 }
 
 int l_is_replaceable_at(lua_State* L) {

src/voxels/Chunk.hpp

@@ -79,6 +79,11 @@ public:
 
     inline void setModified(bool newState) {setFlags(ChunkFlag::MODIFIED, newState);}
 
+    inline void setModifiedAndUnsaved() {
+        setModified(true);
+        setUnsaved(true);
+    }
+
     inline void setLoaded(bool newState) {setFlags(ChunkFlag::LOADED, newState);}
 
     inline void setLoadedLights(bool newState) {setFlags(ChunkFlag::LOADED_LIGHTS, newState);}

src/voxels/Chunks.cpp

@@ -179,9 +179,7 @@ void Chunks::set(int32_t x, int32_t y, int32_t z, uint32_t id, blockstate state)
         chunk->removeBlockInventory(lx, y, lz);
     vox.id = id;
     vox.state = state;
-
-    chunk->setUnsaved(true);
-    chunk->setModified(true);
+    chunk->setModifiedAndUnsaved();
 
     if (y < chunk->bottom) chunk->bottom = y;
     else if (y + 1 > chunk->top) chunk->top = y + 1;

src/voxels/voxel.hpp

@@ -19,10 +19,10 @@ struct blockstate {
 static_assert (sizeof(blockstate) == 2);
 
 inline constexpr blockstate_t blockstate2int(blockstate b) {
-    return b.rotation |
-          (b.segment << 3) |
-          (b.reserved << 5) |
-          (b.userbits << 8);
+    return static_cast<blockstate_t>(b.rotation) |
+           static_cast<blockstate_t>(b.segment) << 3 |
+           static_cast<blockstate_t>(b.reserved) << 5 |
+           static_cast<blockstate_t>(b.userbits) << 8;
 }
 
 inline constexpr blockstate int2blockstate(blockstate_t i) {