Added RAII helper struct to manage a floating label's lifetime

src/floating_label.cpp

@@ -230,6 +230,18 @@ SDL_Rect get_floating_label_rect(int handle)
 	return sdl::empty_rect;
 }
 
+floating_label_scope_helper::floating_label_scope_helper(int handle)
+	: id(handle)
+{
+}
+
+floating_label_scope_helper::~floating_label_scope_helper()
+{
+	if(id != 0) {
+		remove_floating_label(id);
+	}
+}
+
 floating_label_context::floating_label_context()
 {
 	label_contexts.push(std::set<int>());

src/floating_label.hpp

@@ -21,6 +21,15 @@
 
 namespace font
 {
+/** Helper struct which removes the floating label with the given id upon destruction. */
+struct floating_label_scope_helper
+{
+	floating_label_scope_helper(int handle = 0);
+	~floating_label_scope_helper();
+
+	int id;
+};
+
 /**
  * Struct which will hide all current floating labels, and cause floating labels
  * instantiated after it is created to be displayed.