[gnote] Add additional constructor to GnoteSyncException

[Aurimas Černius <aurimasc src gnome org>]

commit 39e30367ead0a09da81ae36db80a6e91fa6ccd86
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Fri May 1 18:47:35 2020 +0300

    Add additional constructor to GnoteSyncException

 src/synchronization/isyncmanager.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/src/synchronization/isyncmanager.hpp b/src/synchronization/isyncmanager.hpp
index e55b3912..6c5e172c 100644
--- a/src/synchronization/isyncmanager.hpp
+++ b/src/synchronization/isyncmanager.hpp
@@ -96,7 +96,9 @@ class GnoteSyncException
   : public std::runtime_error
 {
 public:
-  GnoteSyncException(const char * what_arg) : std::runtime_error(what_arg){}
+  GnoteSyncException(const char *what_arg) : std::runtime_error(what_arg) {}
+  GnoteSyncException(const Glib::ustring & what_arg) : std::runtime_error(what_arg.c_str()) {}
+  GnoteSyncException(Glib::ustring && what_arg) : std::runtime_error(what_arg.c_str()) {}
 };
 
 }