Fix basic operation when APR is compiled with pool debugging.   When pool debugging is active, pool->allocator is NULL, because malloc/free are used directly by APR
Fix basic operation when APR is compiled with pool debugging.   When pool debugging is active, pool->allocator is NULL, because malloc/free are used directly by APR

x-clone/serf,google-code-export/serf,yesoce/serf,x-clone/serf,zhupan/serf,google-code-export/serf,alex1818/serf,SirJson/serf,KyleSanderson/serf,soufianeEL/serf,alex1818/serf,yesoce/serf,x-clone/serf,pengdu/serf,soufianeEL/serf,pengdu/serf,stoneCC/serf,stoneCC/serf,zhengcq315/serf,lazysoez/serf,stoneCC/serf,SirJson/serf,alex1818/serf,SirJson/serf,yesoce/serf,KyleSanderson/serf,zhengcq315/serf,lazysoez/serf,stoneCC/serf,yesoce/serf,lazysoez/serf,KyleSanderson/serf,pengdu/serf,SirJson/serf,zhengcq315/serf,google-code-export/serf,zhupan/serf,zhengcq315/serf,alex1818/serf,google-code-export/serf,lazysoez/serf,pengdu/serf,soufianeEL/serf,x-clone/serf,zhupan/serf,zhupan/serf,KyleSanderson/serf,soufianeEL/serf