Convert boost::optional objects to bool explicitly.

Fixes #417.

1 files changed, 1 insertions, 5 deletions

diff --git a/src/post.h b/src/post.h
index 0fb45e90..5f22fa3c 100644
--- a/src/post.h
+++ b/src/post.h
@@ -205,11 +205,7 @@ public:
   mutable optional<xdata_t> xdata_;
 
   bool has_xdata() const {
-#if BOOST_VERSION >= 105600
-    return xdata_ != NULL;
-#else
-    return xdata_;
-#endif
+    return static_cast<bool>(xdata_);
   }
   void clear_xdata() {
     xdata_ = none;