erroneous reassignment to variable (keypunch?)

Binary package hint: dvd+rw-tools

dvd+rw-tools-7.1-6, kubuntu 10.04.

The following code in poor_man_rewritable() in growisofs_mmc.cpp
contains a coding error:

    else if (profile==0x1A || // DVD+RW
             profile==0x2A || // DVD+RW Double Layer
             (profile&=0xF0)==0x40) // BD-R[E]
    { fprintf (stderr,"%s: flushing cache\n",ioctl_device);
        if (flush_cache(cmd)) exit (errno);
    }

The expression (profile&=0x40) should almost certainly not be
an embedded assignment. Even if it is not causing an existing bug,
this is the kind of thing someone in the future will trip over.