group_tool: fix dump
group_tool: fix dump

dumping the groupd debug buffer broke a while back due
to not reading the correct buffer size

Signed-off-by: David Teigland <cf7ba74ea50525d3d47fcd7a6d69b51121a9f873@redhat.com>

stevenraspudic/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents,asp24/resource-agents,asp24/resource-agents,stevenraspudic/resource-agents