Fix segfault when calling get_src_regname on an invalid or unaligned …

…address (radareorg#10977)

Release 2.7.0 - codename SleepyNull

Release 2.6.9 - salty peas

Release 2.6.0 - codename Rome

Release 2.5.0 - Codename 'eknad'

Release 2.4.0 - Chussy Chaber

Release 2.3.0 - use latest acr 1.4

Release 2.2.0 - Codename: Tió

Release 2.1.0

Release 2.0.1