Resolve valgrind error
Resolve valgrind error

Commit id '1acfc171' resulted in the following valgrind failure:

==25317== 136 (24 direct, 112 indirect) bytes in 1 blocks are definitely lost in loss record 4 of 4
==25317==    at 0x4A06B6F: calloc (vg_replace_malloc.c:593)
==25317==    by 0x4C6F851: virAlloc (viralloc.c:124)
==25317==    by 0x4C71493: virBitmapNew (virbitmap.c:74)
==25317==    by 0x4C71B79: virBitmapNewData (virbitmap.c:434)
==25317==    by 0x402EF2: test8 (virbitmaptest.c:436)
==25317==    by 0x40499F: virtTestRun (testutils.c:157)
==25317==    by 0x402E8D: mymain (virbitmaptest.c:474)
==25317==    by 0x404FDA: virtTestMain (testutils.c:719)
==25317==    by 0x39D0821A04: (below main) (in /usr/lib64/libc-2.16.so)

nertpinx/libvirt,elmarco/libvirt,elmarco/libvirt,cbosdo/libvirt,rlaager/libvirt,shugaoye/libvirt,jfehlig/libvirt,elmarco/libvirt,nertpinx/libvirt,rlaager/libvirt,zhlcindy/libvirt-1.1.4-maintain,zhlcindy/libvirt-1.1.4-maintain,rlaager/libvirt,libvirt/libvirt,eskultety/libvirt,nertpinx/libvirt,taget/libvirt,jardasgit/libvirt,crobinso/libvirt,crobinso/libvirt,agx/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,agx/libvirt,zippy2/libvirt,libvirt/libvirt,nertpinx/libvirt,datto/libvirt,olafhering/libvirt,rlaager/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,zippy2/libvirt,andreabolognani/libvirt,crobinso/libvirt,libvirt/libvirt,datto/libvirt,datto/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,taget/libvirt,zippy2/libvirt,agx/libvirt,elmarco/libvirt,zhlcindy/libvirt-1.1.4-maintain,eskultety/libvirt,fabianfreyer/libvirt,libvirt/libvirt,shugaoye/libvirt,jardasgit/libvirt,olafhering/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,elmarco/libvirt,zhlcindy/libvirt-1.1.4-maintain,nertpinx/libvirt,eskultety/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,rlaager/libvirt,cbosdo/libvirt,zippy2/libvirt,agx/libvirt,shugaoye/libvirt,cbosdo/libvirt,andreabolognani/libvirt,shugaoye/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,olafhering/libvirt,cbosdo/libvirt,crobinso/libvirt,taget/libvirt,olafhering/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,jfehlig/libvirt,datto/libvirt,taget/libvirt,datto/libvirt,agx/libvirt,andreabolognani/libvirt,jfehlig/libvirt,eskultety/libvirt,eskultety/libvirt,andreabolognani/libvirt,taget/libvirt,VenkatDatta/libvirt,cbosdo/libvirt,shugaoye/libvirt