Extract JetProperty#hasDelegateExpressionOrInitializer() and use it where appropriate

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

@@ -248,8 +248,7 @@ public abstract class MemberCodegen<T extends JetElement/* TODO: & JetDeclaratio
     }
 
     private boolean shouldInitializeProperty(@NotNull JetProperty property) {
-        JetExpression initializer = property.getDelegateExpressionOrInitializer();
+        if (!property.hasDelegateExpressionOrInitializer()) return false;
-        if (initializer == null) return false;
 
         PropertyDescriptor propertyDescriptor = (PropertyDescriptor) bindingContext.get(VARIABLE, property);
         assert propertyDescriptor != null;

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetProperty.java

@@ -166,6 +166,10 @@ public class JetProperty extends JetTypeParameterListOwnerStub<PsiJetPropertyStu
         return PsiTreeUtil.getNextSiblingOfType(findChildByType(EQ), JetExpression.class);
     }
 
+    public boolean hasDelegateExpressionOrInitializer() {
+        return getDelegateExpressionOrInitializer() != null;
+    }
+
     @Nullable
     public JetExpression getDelegateExpressionOrInitializer() {
         JetExpression expression = getDelegateExpression();

compiler/frontend/src/org/jetbrains/jet/lang/resolve/DeclarationsChecker.java

@@ -417,7 +417,7 @@ public class DeclarationsChecker {
                                             (setter != null && setter.hasBody());
 
         if (propertyDescriptor.getModality() == Modality.ABSTRACT) {
-            if (property.getDelegateExpressionOrInitializer() == null && property.getTypeRef() == null) {
+            if (!property.hasDelegateExpressionOrInitializer() && property.getTypeRef() == null) {
                 trace.report(PROPERTY_WITH_NO_TYPE_NO_INITIALIZER.on(property));
             }
             return;

compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorResolver.java

@@ -959,7 +959,7 @@ public class DescriptorResolver {
 
     /*package*/
     static boolean hasBody(JetProperty property) {
-        boolean hasBody = property.getDelegateExpressionOrInitializer() != null;
+        boolean hasBody = property.hasDelegateExpressionOrInitializer();
         if (!hasBody) {
             JetPropertyAccessor getter = property.getGetter();
             if (getter != null && getter.hasBody()) {