Extract Function: Extract smart-cast value as parameter

#KT-7576 Fixed

idea/testData/refactoring/extractFunction/basic/memberValUnderSmartCast.kt

@@ -0,0 +1,12 @@
+// SUGGESTED_NAMES: i, getKm
+// PARAM_TYPES: kotlin.Int
+// PARAM_DESCRIPTOR: internal final val meters: kotlin.Int? defined in A
+class A {
+    val meters: Int? = 1
+}
+
+fun test() {
+    val a = A()
+    if (a.meters == null) return
+    val km = <selection>a.meters / 10</selection>
+}