Hello Teeworlds dev team,
There is no bounds check on Index in CDataFileReader::GetItem() leading to OOB access in CMap::Load().
```C++
void *CDataFileReader::GetItem(int Index, int *pType, int *pID)
{
if(!m_pDataFile) { if(pType) *pType = 0; if(pID) *pID = 0; return 0; }
CDatafileItem *i = (CDatafileItem *)(m_pDataFile->m_Info.m_pItemStart+m_pDataFile->m_Info.m_pItemOffsets[Index]);
if(pType)
*pType = (i->m_TypeAndID>>16)&0xffff; // remove sign extention
if(pID)
*pID ...
