PVS-Studio warning V564 for blender

#define  DEFAULT_STREAM  \
  m[dC] = RAC(ccel,dC); \
  \
  if((!nbored & CFBnd)) { \
  \
  ....

A parenthesis is put in a wrong place: if(!(nbored & CFBnd)) { \

This suspicious code was found in blender project by PVS-Studio static code analyzer.
Warning message is:
V564 The '&' operator is applied to bool type value. You've probably forgotten to include parentheses or intended to use the '&&' operator. bf_intern_elbeem solver_main.cpp 567

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/