[NI] Fix type intersection for equal types

compiler/testData/codegen/box/regressions/intersectionOfEqualTypes.kt

@@ -0,0 +1,18 @@
+// WITH_RUNTIME
+
+// FILE: test.kt
+
+fun foo() {
+    takeClass(run {
+        val outer: Sample<out Any>? = null
+        if (outer != null) outer else null
+    })
+}
+
+fun takeClass(instanceClass: Sample<*>?) {}
+class Sample<T : Any>
+
+fun box(): String {
+    foo()
+    return "OK"
+}