PVS-Studio warning V522 for MTASA

void COMMAND_MessageTarget ( const char* szCmdLine )
{
  if ( !(szCmdLine || szCmdLine[0]) )
    return;
  ....
}

This suspicious code was found in MTASA project by PVS-Studio static code analyzer.
Warning message is:
V522 Dereferencing of the null pointer 'szCmdLine' might take place. Check the logical condition. clientcommands.cpp 396

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/