Add freeing managed assembly memory on reload/unload

Source/Engine/Core/Memory/Allocation.cpp

@@ -14,6 +14,9 @@ void ArenaAllocator::Free()
         Allocator::Free(page);
         page = next;
     }
+
+    // Unlink
+    _first = nullptr;
 }
 
 void* ArenaAllocator::Allocate(uint64 size, uint64 alignment)
@@ -31,14 +34,14 @@ void* ArenaAllocator::Allocate(uint64 size, uint64 alignment)
         page->Memory = Allocator::Allocate(pageSize);
         page->Next = _first;
         page->Offset = 0;
-        page->Size = pageSize;
+        page->Size = (uint32)pageSize;
         _first = page;
     }
 
     // Allocate within a page
     page->Offset = Math::AlignUp(page->Offset, (uint32)alignment);
     void* mem = (byte*)page->Memory + page->Offset;
-    page->Offset += size;
+    page->Offset += (uint32)size;
 
     return mem;
 }

Source/Engine/Scripting/ManagedCLR/MCore.cpp

@@ -143,6 +143,7 @@ void MAssembly::Unload(bool isReloading)
 #else
     _classes.ClearDelete();
 #endif
+    Memory.Free();
 
     Unloaded(this);
 }