KT-1743 Analyze immutable local variables and parameters which are captured in closure

#KT-1743 fixed

compiler/backend/src/org/jetbrains/jet/codegen/JetTypeMapper.java

@@ -943,7 +943,7 @@ public class JetTypeMapper {
         }
         else if (descriptor instanceof VariableDescriptor) {
             Boolean aBoolean = bindingContext.get(BindingContext.MUST_BE_WRAPPED_IN_A_REF, (VariableDescriptor) descriptor);
-            if (aBoolean != null && aBoolean) {
+            if (aBoolean != null && aBoolean && ((VariableDescriptor) descriptor).isVar()) {
                 JetType outType = ((VariableDescriptor) descriptor).getType();
                 return StackValue.sharedTypeForType(mapType(outType, MapTypeMode.VALUE));
             }

compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/ExpressionTypingUtils.java

@@ -134,7 +134,7 @@ public class ExpressionTypingUtils {
 
     public static void checkWrappingInRef(JetSimpleNameExpression expression, ExpressionTypingContext context) {
         VariableDescriptor variable = BindingContextUtils.extractVariableDescriptorIfAny(context.trace.getBindingContext(), expression, true);
-        if (variable != null && variable.isVar()) {
+        if (variable != null) {
             DeclarationDescriptor containingDeclaration = variable.getContainingDeclaration();
             if (context.scope.getContainingDeclaration() != containingDeclaration && containingDeclaration instanceof CallableDescriptor) {
                 context.trace.record(MUST_BE_WRAPPED_IN_A_REF, variable);

compiler/testData/diagnostics/tests/UninitializedOrReassignedVariables.jet

@@ -328,7 +328,7 @@ fun func() {
     val <!UNUSED_VARIABLE!>a<!> = object {
         val x = b
         {
-            <!VAL_REASSIGNMENT!>b<!> = <!UNUSED_VALUE!>4<!>
+            <!VAL_REASSIGNMENT!>b<!> = 4
             <!UNRESOLVED_REFERENCE!>$b<!> = 3
         }
     }