packagers: minidnf: free base if beginTransaction fails
packagers: minidnf: free base if beginTransaction fails

Change-Id: I953e5d36573a5023dba2e8aef02f552fce32ef3f
Signed-off-by: Alon Bar-Lev <2e3ceb4d37adc6ae3ccc00d3646e0e0a036ace03@redhat.com>

alonbl/otopi,alonbl/otopi,alonbl/otopi