[NI] Don't forget to analyze whole block for last postponed expression

compiler/testData/diagnostics/tests/functionLiterals/functionLiteralInIf.kt

@@ -1,13 +1,12 @@
-// !WITH_NEW_INFERENCE
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_EXPRESSION
 
 import java.util.HashSet
 
 fun test123() {
     val g: (Int) -> Unit = if (true) {
-        val set = <!NI;DEBUG_INFO_MISSING_UNRESOLVED!>HashSet<!><<!NI;DEBUG_INFO_MISSING_UNRESOLVED!>Int<!>>();
+        val set = HashSet<Int>();
         { i ->
-            <!NI;UNRESOLVED_REFERENCE!>set<!>.<!NI;DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>add<!>(i)
+            set.add(i)
         }
     }
     else {