Fixed KT-5020 Smart completion should work at the initializer of a val with no explicit type

#KT-5020 Fixed

idea/testData/completion/smart/ImplicitlyTypedValInitializer1.kt

@@ -0,0 +1,6 @@
+fun foo(p1: String, p2: Int) {
+    val v = <caret>"a"
+}
+
+// EXIST: p1
+// ABSENT: p2

idea/testData/completion/smart/ImplicitlyTypedValInitializer2.kt

@@ -0,0 +1,6 @@
+class A(s: String) {
+    val v = s.<caret>length()
+}
+
+// EXIST: size
+// ABSENT: substring