virbitmaptest: Shut coverity up in case of broken test
virbitmaptest: Shut coverity up in case of broken test

Coverity reported a memleak in the test added in 7efd5fd1b02. In case
the code will be broken and the code will actually parse a faulty bitmap
the resulting pointer would be leaked. Free it although that shouldn't
ever happen.

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