PVS-Studio warning V519 for Quake3

static void setupQuad( long xOff, long yOff )
{
    ...
  numQuadCels  = (.....);
  numQuadCels += numQuadCels/4 + numQuadCels/16;
  numQuadCels += 64;
  numQuadCels  = (.....);
  numQuadCels += numQuadCels/4;
  numQuadCels += 64;
  ...
}

This suspicious code was found in Quake3 project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'numQuadCels' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 1004, 1006. quake3 cl_cin.c 1006

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/