rename listener variable for readability

comment.py

@@ -65,8 +65,8 @@ for name in config.get('network', 'hogs').split(',').strip('\"'):
         print('Error configuring button', b, e)
         continue
 
-oscMacro = OscCommentMacroListener(servers)
 walker = ParseTreeWalker()
+listener = OscCommentMacroListener(servers)
 
 
 def comment(text):
@@ -78,7 +78,7 @@ def comment(text):
     parser._listeners.append(SyntaxErrorListener())
     try:
         tree = parser.prog()
-        walker.walk(oscMacro, tree)
+        walker.walk(listener, tree)
     except SyntaxError as e:
         logger.debug(e)     # antlr internal listener prints the error
 #                           # log it to the debug logger anyway