PVS-Studio warning V501 for Firefox

void Reverb::process(....)
{
  ....
  bool isCopySafe =
    destinationChannelL &&
    destinationChannelR &&
    size_t(destinationBus->mDuration) >= framesToProcess &&
    size_t(destinationBus->mDuration) >= framesToProcess;
  ....
}

This suspicious code was found in Firefox project by PVS-Studio static code analyzer.
Warning message is:
V501 There are identical sub-expressions 'size_t (destinationBus->mDuration) >= framesToProcess' to the left and to the right of the '&&' operator. reverb.cpp 192

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/