Fix bslma_autodeallocator.t.cpp on sun (no ptrdiff_t)
Fix bslma_autodeallocator.t.cpp on sun (no ptrdiff_t)

jmptrader/bde,idispatch/bde,dbremner/bde,idispatch/bde,bloomberg/bde-allocator-benchmarks,osubboo/bde,gbleaney/Allocator-Benchmarks,minhlongdo/bde,saxena84/bde,RMGiroux/bde-allocator-benchmarks,apaprocki/bde,che2/bde,minhlongdo/bde,che2/bde,mversche/bde,bloomberg/bde,dharesign/bde,che2/bde,abeels/bde,osubboo/bde,mversche/bde,dbremner/bde,RMGiroux/bde-allocator-benchmarks,apaprocki/bde,bowlofstew/bde,bowlofstew/bde,saxena84/bde,dbremner/bde,abeels/bde,dbremner/bde,gbleaney/Allocator-Benchmarks,bloomberg/bde-allocator-benchmarks,mversche/bde,minhlongdo/bde,bloomberg/bde,frutiger/bde,apaprocki/bde,saxena84/bde,jmptrader/bde,frutiger/bde,bloomberg/bde,RMGiroux/bde-allocator-benchmarks,bloomberg/bde-allocator-benchmarks,mversche/bde,idispatch/bde,gbleaney/Allocator-Benchmarks,dharesign/bde,che2/bde,abeels/bde,abeels/bde,abeels/bde,jmptrader/bde,saxena84/bde,bowlofstew/bde,bloomberg/bde-allocator-benchmarks,frutiger/bde,apaprocki/bde,RMGiroux/bde-allocator-benchmarks,frutiger/bde,jmptrader/bde,RMGiroux/bde-allocator-benchmarks,bloomberg/bde,osubboo/bde,idispatch/bde,bowlofstew/bde,dharesign/bde,gbleaney/Allocator-Benchmarks,apaprocki/bde,bloomberg/bde-allocator-benchmarks,abeels/bde,bloomberg/bde,osubboo/bde,minhlongdo/bde,dharesign/bde