TD-1912 comile error in windows

src/os/src/detail/osFile.c

@@ -116,7 +116,7 @@ int64_t taosWriteImp(int32_t fd, void *buf, int64_t n) {
 }
 
 int64_t taosLSeekImp(int32_t fd, int64_t offset, int32_t whence) {
-  return tlseek(fd, offset, whence);
+  return (int64_t)tlseek(fd, (long)offset, whence);
 }
 
 #ifndef TAOS_OS_FUNC_FILE_SENDIFLE