Free eye check for C++03 devs

bad_cpp03.md

Free eye check for my fellow C++03 devs, what's wrong with this:

for (size_t idx = myVector.size() - 1; idx >= 0; ++idx)
{
    doSomething(myVector[idx]);     
}

for (size_t idx = myVector.size() - 1; idx >= 0; --idx)
{
    doSomething(myVector[idx]);     
}