Fixed a compilation error on gcc 3.2 compilers.
Fixed a compilation error on gcc 3.2 compilers.

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