Fixes HistoryHolder CopyOnto not actually copying memory.

Signed-off-by: Deukhoofd <Deukhoofd@gmail.com>

src/Battling/History/HistoryHolder.hpp

@@ -76,6 +76,7 @@ namespace CreatureLib::Battling {
             other._offset = _offset;
             other._capacity = _capacity;
             other._memory = static_cast<uint8_t*>(malloc(_capacity));
+            memcpy(other._memory, _memory, _capacity);
             if (_top != nullptr) {
                 other._top = reinterpret_cast<HistoryElement*>(other._memory + ((u8*)_top - _memory));
             }