fix local assignment

was missing a method that got lost in copy/paste
also renaming to get guard to pick up tests

test/ruby/test_assignment1.rb

@@ -0,0 +1,26 @@
+require_relative "helper"
+
+module Ruby
+  class TestLocalAssignment < MiniTest::Test
+    include RubyTests
+
+    def test_local
+      lst = compile( "foo = bar")
+      assert_equal LocalAssignment , lst.class
+    end
+    def test_local_name
+      lst = compile( "foo = bar")
+      assert_equal :foo , lst.name
+    end
+    def test_local_const
+      lst = compile( "foo = 5")
+      assert_equal LocalAssignment , lst.class
+    end
+    def test_local_ivar
+      lst = compile( "foo = @iv")
+      assert_equal LocalAssignment , lst.class
+      assert_equal InstanceVariable , lst.value.class
+    end
+
+  end
+end