stop using self in class functions

sim/gate.lua

@@ -23,33 +23,33 @@ function Gate.new(self, objref, definition)
 	return o
 end
 
-function Gate.addport(self, port)
-	self.ports[#self.ports+1] = port
-	Port.setgate(port, self)
+function Gate.addport(gate, port)
+	gate.ports[#gate.ports+1] = port
+	Port.setgate(port, gate)
 end
 
 function Gate.getportstate(gate, index)
 	return gate.ports[index].group.state
 end
 
-function Gate.setportstate(self, index, state)
-	Port.setstate(self.ports[index], state)
+function Gate.setportstate(gate, index, state)
+	Port.setstate(gate.ports[index], state)
 end
 
-function Gate.initdata(self)
-	self.data = {}
+function Gate.initdata(gate)
+	gate.data = {}
 end
 
-function Gate.getdata(self)
-	return self.data
+function Gate.getdata(gate)
+	return gate.data
 end
 
-function Gate.getportisrising(self, index)
-	return Port.isrising(self.ports[index])
+function Gate.getportisrising(gate, index)
+	return Port.isrising(gate.ports[index])
 end
 
-function Gate.getportisfalling(self, index)
-	return Port.isfalling(self.ports[index])
+function Gate.getportisfalling(gate, index)
+	return Port.isfalling(gate.ports[index])
 end
 
 function Gate.cb(gate, ...)