PVS-Studio warning V537 for Quake3

void Terrain_AddMovePoint(....) {
  ...
  x = ( v[ 0 ] - p->origin[ 0 ] ) / p->scale_x;
  y = ( v[ 1 ] - p->origin[ 1 ] ) / p->scale_x;
  ...
}

This is what should have been written here: y = ( v[ 1 ] - p->origin[ 1 ] ) / p->scale_y;

This suspicious code was found in Quake3 project by PVS-Studio static code analyzer.
Warning message is:
V537 Consider reviewing the correctness of 'scale_x' item's usage. Radiant terrain.cpp 1408

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/