loggingevent.cxx (InternalLoggingEvent::getMDC): Fix MDC variable shadowing.
loggingevent.cxx (InternalLoggingEvent::getMDC): Fix MDC variable shadowing.

csuideal/log4cplus,csuideal/log4cplus,hunter-packages/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,hunter-packages/log4cplus,hunter-packages/log4cplus,csuideal/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,hunter-packages/log4cplus,csuideal/log4cplus