radiobert: lower collectd-adsb interval to 1, catch exceptions

hosts/radiobert/collectd-adsb.rb

@@ -5,7 +5,7 @@ require 'json'
 require 'distance'
 
 HOSTNAME = IO::readlines("/proc/sys/kernel/hostname").join.chomp
-INTERVAL = 10
+INTERVAL = 1
 POS = [ 51.08102, 13.72806 ]
 
 loop do
@@ -23,5 +23,10 @@ loop do
     puts "PUTVAL \"#{HOSTNAME}/dump1090-distance/current-#{flight}\" interval=#{INTERVAL} N:#{dist}"
   end
 
+rescue
+  STDERR.puts $!
+
+ensure
   sleep INTERVAL
+
 end