cpp, qt: Fix version info comparison
* lang/cpp/src/engineinfo.h (EngineInfo::Version::operator>(const Version &)): Fix logic. (EngineInfo::Version::operator>(const char *)): Use Version-overload of operator>. * lang/qt/tests/t-various.cpp: Add test.
This fixes a logic error that 2.0.0 > 2.0.0 would return true.