fix code listener logic bug

next's position was only updated initially
previous logic relied on pushing everything long rightly
but it wasn't right, and no harm in setting position twice,
as events only fire if there is real change

test/risc/test_linker1.rb

@@ -0,0 +1,17 @@
+require_relative "helper"
+
+module Risc
+  class TestMachinePos < MiniTest::Test
+    def setup
+      Parfait.boot!
+      Risc.boot!
+      @linker = RubyX::RubyXCompiler.new("class Space; def main(arg);a = 1;return a;end;end").ruby_to_risc(:arm)
+      @linker.position_all
+    end
+    def test_positions_set
+      @linker.object_positions.each do |obj , position|
+        assert Position.get(obj).valid? , "#{Position.get(obj)} , #{obj.object_id.to_s(16)}"
+      end
+    end
+  end
+end