for everyone how is interested this is the list of Cisco WLCs the check will discover right now:
".1.3.6.1.4.1.14179.1.1.4.3", # productGroup3
".1.3.6.1.4.1.9.1.1069", # cisco5500Wlc
".1.3.6.1.4.1.9.1.1279", # ciscoAirCt2504K9
".1.3.6.1.4.1.9.1.1293", # ciscoWiSM2
".1.3.6.1.4.1.9.1.1615", # cisco8500WLC
".1.3.6.1.4.1.9.1.1631", # ciscoVirtualWlc
".1.3.6.1.4.1.9.1.1645", # cisco5760wlc
".1.3.6.1.4.1.9.1.2170", # cisco5520WLC
".1.3.6.1.4.1.9.1.2171", # cisco8540Wlc
".1.3.6.1.4.1.9.1.2250", # 2006 (?) OID not found in the Cisco SNMP navigator
".1.3.6.1.4.1.9.1.2370", # 4402 (?) OID not found in the Cisco SNMP navigator
".1.3.6.1.4.1.9.1.2371", # 4404 (?) OID not found in the Cisco SNMP navigator
".1.3.6.1.4.1.9.1.2391", # ciscoC9800CLK9
".1.3.6.1.4.1.9.1.2427", # cisco3504WLC
".1.3.6.1.4.1.9.1.2530", # ciscoC980040K9
".1.3.6.1.4.1.9.1.2860", # ciscoC9800LCK9
@tribe: maybe you want to add these comments to the check 
and this devices are still missing from the list:
".1.3.6.1.4.1.9.1.2861", # ciscoC9800LFK9
".1.3.6.1.4.1.9.1.2669", # ciscoC980080K9
".1.3.6.1.4.1.9.1.828", # ciscoAirWlc2106K9
".1.3.6.1.4.1.9.1.1295", # cisco7500Wlc
".1.3.6.1.4.1.9.1.1926", # ciscoWlcCt5508K9
".1.3.6.1.4.1.9.1.1927", # ciscoWlcCt2504K9
".1.3.6.1.4.1.9.1.2825", # ciscoCMeWlc
".1.3.6.1.4.1.9.1.2026", # catAIRCT57006
".1.3.6.1.4.1.9.1.2531", # ciscoAIRCT9880K9
Cheers
Thomas