PVS-Studio warning V530 for Firebird

void InputDevices::indev::getPos(fpos_t* out) const
{
  fb_assert(out);
  fb_assert(indev_fpointer);
  fgetpos(indev_fpointer, out);
}

This suspicious code was found in Firebird project by PVS-Studio static code analyzer.
Warning message is:
V530 The return value of function 'fgetpos' is required to be utilized. inputdevices.cpp 118

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/