Added one more test.

tests/cases/fourslash/findAllRefsForVariableInImplementsClause01.ts

@@ -0,0 +1,10 @@
+/// <reference path="fourslash.ts"/>
+
+
+////var Base = class { };
+////class C extends Base implements [|Base|] { }
+
+let ranges = test.ranges();
+for (let range of ranges) {
+    verify.referencesCountIs(0);
+}