Uptime OID not working when asset has zero in its key

[belavina]

When SNMP asset (PDU/UPS) with 0 in its key is created, snmpsimd.py reports evalsha execution error (script passed to snmpsimd.py located in enginecore/scriptsnmppub.lua);

Request var-binds: 1.3.6.1.2.1.1.2.0=<>, flags: NEXT, GET
data error at /tmp/simengine/190/public.snmprec controller for 1.3.6.1.2.1.1.2.0: Error running script (call to f_14c4ad5b88087a058dff387f56cbe4c356819080): @user_script:18: user_script:18: attempt to perform arithmetic on local 'start_time' (a boolean value) 

Most likely happening due to 0 substitution with key:gsub('0', '') in the evalsha lua script:

simengine/enginecore/script/snmppub.lua

Lines 9 to 12 in e9629a4

	if oid == "1.3.6.1.2.1.1.3.0" then
	local formatted_key, _ = key:gsub('0', '')
	local start_time = redis.call('get', (tonumber(formatted_key)..":start_time"))
	local now = redis.call('TIME')