"Unused value" error added to existed tests

idea/testData/checker/regression/AssignmentsUnderOperators.jet

@@ -2,5 +2,5 @@ fun test() {
   var a : Any? = null
   if (a is Any) else a = null;
   while (a is Any) a = null
-  while (true) a = null
+  while (true) a = <warning>null</warning>
 }

idea/testData/checker/regression/CoercionToUnit.jet

@@ -2,7 +2,7 @@ fun foo(u : Unit) : Int = 1
 
 fun test() : Int {
     foo(<error>1</error>)
-    val a : fun() : Unit = {
+    val <warning>a</warning> : fun() : Unit = {
         foo(<error>1</error>)
     }
     return 1

idea/testData/checker/regression/DoubleDefine.jet

@@ -32,7 +32,7 @@ fun evaluateAdd(expr: StringBuilder, numbers: ArrayList<Int>): Int {
 fun evaluate(expr: StringBuilder, numbers: ArrayList<Int>): Int {
   val lhs = evaluateAdd(expr, numbers)
   if (expr.length() > 0) {
-    val c = expr.charAt(0)
+    val <warning>c</warning> = expr.charAt(0)
     expr.deleteCharAt(0)
   }
   return lhs

idea/testData/checker/regression/Jet124.jet

@@ -1,8 +1,8 @@
 fun foo1() : fun (Int) : Int = { (x: Int) => x }
 
 fun foo() {
-  val h : fun (Int) : Int = foo1();
+  val <warning>h</warning> : fun (Int) : Int = foo1();
   h(1)
-  val m : fun (Int) : Int = {(a : Int) => 1}//foo1()
+  val <warning>m</warning> : fun (Int) : Int = {(a : Int) => 1}//foo1()
   m(1)
 }

idea/testData/checker/regression/Jet183.jet

@@ -18,5 +18,5 @@ enum class Foo<T> {
 
 
 fun box() {
-   val x: ProtocolState = ProtocolState.WAITING
+   val <warning>x</warning>: ProtocolState = ProtocolState.WAITING
 }

idea/testData/checker/regression/ScopeForSecondaryConstructors.jet

@@ -11,7 +11,7 @@
       bar = 1
       this.bar
       1 : Int
-      val a : Int =1
+      val <warning>a</warning> : Int =1
       this : Foo
     }
   }