IFNAME_SHORT => 1 introduces problems with some devices (cisco c800)

[nicolatron]

If I activate the option
IFNAME_SHORT => 1
In Site.conf, the inferfaces are not imported for certain devices, for example cisco c800 routers.
I can get the interfaces names with SNMP walk and also with a test code using SNMP::Info.
The names the c800 is giving are like "GigabitEthernet4" while for example a cisco 2800 (wich works with the IFNAME_SHORT => 1) give names like "FastEthernet0/0".
Attached the resutls of snmpwalk .1.3.6.1.2.1.2.2.1 on a c800 that doesn't work and a c800 that works.
Not a big deal since we can just don't use IFNAME_SHORT.

2800.txt
c800.txt