Extract Function: Extract smart-cast value as parameter

#KT-7576 Fixed

idea/testData/refactoring/extractFunction/basic/extensionValUnderSmartCast.kt.after

@@ -0,0 +1,16 @@
+// SUGGESTED_NAMES: i, getKm
+// PARAM_TYPES: A
+// PARAM_DESCRIPTOR: val a: A defined in test
+class A {
+
+}
+
+val A.meters: Int? get() = 1
+
+fun test() {
+    val a = A()
+    if (a.meters == null) return
+    val km = i(a)
+}
+
+private fun i(a: A) = a.meters / 10