Fix ssl_verify usage triggering error, "Either 'ssl_verify_default_ca…

…' or 'ssl_verify_ca' must be specified when ssl_verify is true"

lib/log-courier/server_tcp.rb

@@ -59,7 +59,7 @@ def initialize(options = {})
           raise "[LogCourierServer] '#{k}' is required" if @options[k].nil?
         end
 
-        if @options[:ssl_verify] and (not @options[:ssl_verify_default_ca] && @options[:ssl_verify_ca].nil?)
+        if @options[:ssl_verify] and (!@options[:ssl_verify_default_ca] && @options[:ssl_verify_ca].nil?)
           raise '[LogCourierServer] Either \'ssl_verify_default_ca\' or \'ssl_verify_ca\' must be specified when ssl_verify is true'
         end
       end