Take into account data flow info changes for special call (if/when/elvis/!!) arguments #KT-10824 Fixed

Smart casts on complex expressions look as no more possible

compiler/testData/codegen/box/smartCasts/smartCastInsideIf.kt

@@ -0,0 +1,15 @@
+class A(val s: String = "FAIL")
+
+private fun foo(a: A?, aOther: A?): A {
+    return if (a == null) {
+        A()
+    }
+    else {
+        if (aOther == null) {
+            return A()
+        }
+        aOther
+    }
+}
+
+fun box() = foo(A("???"), A("OK")).s