[boost] Bug in mapped_file.cpp

In the file \boost\libs\iostreams\src\mapped_file.cpp on line 126 there is a simple member function called mapped_file_source::is_open(). It was assuming that an invalid handle was 0 but that is not true for a Windows bulid. I changed the function to the following: bool mapped_file_source::is_open() const { #ifdef BOOST_IOSTREAMS_WINDOWS return !!pimpl_ && pimpl_->handle_ != INVALID_HANDLE_VALUE; #else return !!pimpl_ && pimpl_->handle_ != 0; #endif } This was from the latest revision of svn. Regards