bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
/* BranchTypes.h */
#ifndef __BRANCHTYPES_H
#define __BRANCHTYPES_H
#ifndef _7ZIP_BYTE_DEFINED
#define _7ZIP_BYTE_DEFINED
typedef unsigned char Byte;
#endif
#ifndef _7ZIP_UINT16_DEFINED
#define _7ZIP_UINT16_DEFINED
typedef unsigned short UInt16;
#endif
#ifndef _7ZIP_UINT32_DEFINED
#define _7ZIP_UINT32_DEFINED
#ifdef _LZMA_UINT32_IS_ULONG
typedef unsigned long UInt32;
#else
typedef unsigned int UInt32;
#endif
#endif
#ifndef _7ZIP_UINT64_DEFINED
#define _7ZIP_UINT64_DEFINED
#ifdef _SZ_NO_INT_64
typedef unsigned long UInt64;
#else
#if defined(_MSC_VER) || defined(__BORLANDC__)
typedef unsigned __int64 UInt64;
#else
typedef unsigned long long int UInt64;
#endif
#endif
#endif
/* #define _LZMA_NO_SYSTEM_SIZE_T */
/* You can use it, if you don't want <stddef.h> */
#ifndef _7ZIP_SIZET_DEFINED
#define _7ZIP_SIZET_DEFINED
#ifdef _LZMA_NO_SYSTEM_SIZE_T
typedef UInt32 SizeT;
#else
#include <stddef.h>
typedef size_t SizeT;
#endif
#endif
#endif