Example

bool fnc(){
return true;
}

int main(int argc, char* argv[])
{
if( fnc() == true ){
return 1;
}
return 0;
}

Solution
Remove unnecessary equality comparisons.

bool fnc(){
return true;
}

int main(int argc, char* argv[])
{
if( fnc() ){
return 1;
}
return 0;

}