Convert boost::optional objects to bool explicitly.

Fixes #417.

1 files changed, 1 insertions, 5 deletions

diff --git a/src/item.h b/src/item.h
index ba812175..dbba53a8 100644
--- a/src/item.h
+++ b/src/item.h
@@ -174,11 +174,7 @@ public:
   static bool use_aux_date;
 
   virtual bool has_date() const {
-#if BOOST_VERSION >= 105600
-    return _date != NULL;
-#else
-    return _date;
-#endif
+    return static_cast<bool>(_date);
   }
 
   virtual date_t date() const {