PVS-Studio warning V517 for Doom3

void idRenderModelLiquid::InitFromFile(....)
{
  ...
  if ( !token.Icmp( "seed" ) ) {
  ...
  } else if ( !token.Icmp( "seed" ) ) {
  ...
}

This suspicious code was found in Doom3 project by PVS-Studio static code analyzer.
Warning message is:
V517 The use of 'if (A) {...} else if (A) {...}' pattern was detected. There is a probability of logical error presence. Check lines: 364, 402. DoomDLL model_liquid.cpp 364

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/