use guard clause

Author: monkstone

lib/jruby_art/java_opts.rb

@@ -8,9 +8,8 @@ def initialize
     puts arg_file
     @opts = []
     @opts += File.read(arg_file).split(/\s+/) if FileTest.exist?(arg_file)
-    if opts.empty? && Processing::RP_CONFIG.fetch('java_args', false)
-      @opts += Processing::RP_CONFIG['java_args'].split(/\s+/)
-    end
+    return unless opts.empty? && Processing::RP_CONFIG.fetch('java_args', false)
+    @opts += Processing::RP_CONFIG['java_args'].split(/\s+/)
   end
 end