Fixes lseek for big files on Windows

It was broken in ef69c37f66, before that we were using _lseeki64.

Fixes #8459

source/graphics/MapIO.cpp

@@ -56,8 +56,14 @@ Status LoadHeightmapImageOs(const OsPath& filepath, std::vector<u16>& heightmap)
 	File file;
 	RETURN_STATUS_IF_ERR(file.Open(OsString(filepath), O_RDONLY));
 
+#if OS_WIN
+	// sizeof(long) == 4 on Windows so we can't use lseek.
+	size_t fileSize = _lseeki64(file.Descriptor(), 0, SEEK_END);
+	_lseeki64(file.Descriptor(), 0, SEEK_SET);
+#else
 	size_t fileSize = lseek(file.Descriptor(), 0, SEEK_END);
 	lseek(file.Descriptor(), 0, SEEK_SET);
+#endif
 
 	std::shared_ptr<u8> fileData;
 	RETURN_STATUS_IF_ERR(AllocateAligned(fileData, fileSize, maxSectorSize));

source/lib/file/io/io.cpp

@@ -51,7 +51,12 @@ Status Issue(aiocb& cb, [[maybe_unused]] size_t queueDepth)
 	else
 #endif
 	{
+#if OS_WIN
+		// sizeof(long) == 4 on Windows so we can't use lseek.
+		ENSURE(_lseeki64(cb.aio_fildes, cb.aio_offset, SEEK_SET) == cb.aio_offset);
+#else
 		ENSURE(lseek(cb.aio_fildes, cb.aio_offset, SEEK_SET) == cb.aio_offset);
+#endif
 
 		void* buf = (void*)cb.aio_buf;	// cast from volatile void*
 		const ssize_t bytesTransferred = (cb.aio_lio_opcode == LIO_WRITE)? write(cb.aio_fildes, buf, cb.aio_nbytes) : read(cb.aio_fildes, buf, cb.aio_nbytes);

source/lib/sysdep/os/win/wposix/wfilesystem.h

@@ -53,6 +53,6 @@ typedef unsigned int mode_t;	// defined by MinGW but not VC
 #define S_ISREG(m) (m & S_IFREG)
 
 
-#include <corecrt_io.h> // read, write, lseek
+#include <corecrt_io.h> // read, write
 
 #endif	// #ifndef INCLUDED_WFILESYSTEM