PVS-Studio warning V563 for squirrel

SQRESULT sq_rawdeleteslot(HSQUIRRELVM v,
  SQInteger idx,SQBool pushval)
{
  ...
  if(pushval != 0)
    if(pushval) v->GetUp(-1) = t;
  else
    v->Pop(1);   <<<---
  ...
}

The code "v->>Pop(1);" is never executed.

This suspicious code was found in squirrel project by PVS-Studio static code analyzer.
Warning message is:
V563 It is possible that this 'else' branch must apply to the previous 'if' statement. squirrel sqapi.cpp 756

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/