[gnote] Fix DBG_ASSERT for newer Glibmm

[Aurimas Černius <aurimasc src gnome org>]

commit b7c3fcec2539c718fd9206c499bd6041a106b49b
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Mon Nov 28 23:53:21 2016 +0200

    Fix DBG_ASSERT for newer Glibmm

 src/debug.hpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/debug.hpp b/src/debug.hpp
index 2cc733e..74da13d 100644
--- a/src/debug.hpp
+++ b/src/debug.hpp
@@ -47,7 +47,7 @@ namespace utils {
 
 #ifdef DEBUG
 #define DBG_ASSERT(cond, reason)  \
-  ::utils::dbg_assert(cond, #cond, __FILE__, __LINE__, reason)
+  ::utils::dbg_assert(bool(cond), #cond, __FILE__, __LINE__, reason)
 #else
 #define DBG_ASSERT(cond, reason)  \
   assert(cond)