Minor, encapsulate logic

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/resolver/JavaConstructorResolver.java

@@ -162,7 +162,7 @@ public final class JavaConstructorResolver {
                     Collections.<AnnotationDescriptor>emptyList(),
                     method.getName(),
                     typeTransformer.transformToType(returnType, typeVariableResolver),
-                    method.getAnnotationParameterDefaultValue() != null,
+                    method.hasAnnotationParameterDefaultValue(),
                     varargElementType));
 
             index++;

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/structure/JavaMethod.java

@@ -56,13 +56,9 @@ public class JavaMethod extends JavaMemberImpl implements JavaTypeParameterListO
         return valueParameters(getPsi().getParameterList().getParameters());
     }
 
-    @Nullable
-    public Object getAnnotationParameterDefaultValue() {
+    public boolean hasAnnotationParameterDefaultValue() {
         PsiMethod psiMethod = getPsi();
-        if (psiMethod instanceof PsiAnnotationMethod) {
-            return ((PsiAnnotationMethod) psiMethod).getDefaultValue();
-        }
-        return null;
+        return psiMethod instanceof PsiAnnotationMethod && ((PsiAnnotationMethod) psiMethod).getDefaultValue() != null;
     }
 
     @Nullable