msvc12/log4cplus.props: Raise default Windows version to 0x0600, i.e., Windows Vista.
msvc12/log4cplus.props: Raise default Windows version to 0x0600, i.e., Windows Vista.

csuideal/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,csuideal/log4cplus,csuideal/log4cplus,csuideal/log4cplus