Recursive equals: fix false positive with different argument

Related to KT-13702

idea/testData/inspectionsLocal/recursiveEqualsCall/recursiveFakeNoOther.kt

@@ -0,0 +1,9 @@
+// PROBLEM: none
+
+class Test {
+    override fun equals(other: Any?): Boolean {
+        val s = Test()
+        if (<caret>this == s) return true
+        return false
+    }
+}