Fix goto class action in Idea 13.1

idea/testData/navigation/gotoClass/noImplementationTrait.kt

@@ -0,0 +1,9 @@
+package test
+
+trait NoImplementationTrait {
+    fun foo(): Int
+    fun some(): String
+}
+
+// SEARCH_TEXT: NoImplemen
+// REF: (test).NoImplementationTrait