Now compiles on older versions of gtk.

src/cmake.cc

@@ -46,7 +46,7 @@ CMake::CMake(const boost::filesystem::path &path) {
 }
 
 bool CMake::create_compile_commands(const boost::filesystem::path &path) {
-  auto message=Dialog::Message("Creating "+path.string()+"/compile_commands.json");
+  Dialog::Message message("Creating "+path.string()+"/compile_commands.json");
   message.wait_until_drawn();
   auto exit_code=Singleton::terminal->execute(Singleton::config->terminal.cmake_command+" . -DCMAKE_EXPORT_COMPILE_COMMANDS=ON", path);
   message.hide();