PVS-Studio warning V519 for Lugaru

int Game::DrawGLScene(void)
{
  ...
  radius=fast_sqrt(maxdistance);
  radius=110;
  ...
}

This suspicious code was found in Lugaru project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'radius' object is assigned values twice successively. Perhaps this is a mistake. Lugaru gamedraw.cpp 1505

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/