Make the message sending functions return a bool, closes Unvanquished#3

tools/cbse/templates/implementation.cpp

@@ -22,22 +22,24 @@ Entity::Entity(const MessageHandler *messageHandlers, const int* componentOffset
 Entity::~Entity() {
 }
 
-void Entity::SendMessage(int msg, const void* data) {
+bool Entity::SendMessage(int msg, const void* data) {
     MessageHandler handler = messageHandlers[msg];
     if (handler) {
         handler(this, data);
+        return true;
     }
+    return false;
 }
 
 // Entity helper functions to send message e.g.
 //   void Entity::Damage(int value);
 {% for message in messages %}
-    void Entity::{{message.name}}({{message.get_function_args()}}) {
+    bool Entity::{{message.name}}({{message.get_function_args()}}) {
         {% if message.get_num_args() == 0 %}
-            SendMessage({{message.get_enum_name()}}, nullptr);
+            return SendMessage({{message.get_enum_name()}}, nullptr);
         {% else %}
             {{message.get_tuple_type()}} data({{message.get_args_names()}});
-            SendMessage({{message.get_enum_name()}}, &data);
+            return SendMessage({{message.get_enum_name()}}, &data);
         {% endif %}
     }
 {% endfor %}

tools/cbse/templates/implementation.h

@@ -47,12 +47,12 @@ class Entity {
 
         // This function should never actually be used directly, it dispatches
         // the messages to the right components
-        void SendMessage(int msg, const void* data);
+        bool SendMessage(int msg, const void* data);
 
-        // Handy functions to send a specific message to the components of Entity e.g.
-        //   void Damage(int amount);
+        // Handy functions to send a specific message to the components of Entity e.g. (returns true if the message was handled)
+        //   bool Damage(int amount);
         {% for message in messages %}
-            void {{message.name}}({{message.get_function_args()}});
+            bool {{message.name}}({{message.get_function_args()}});
         {% endfor %}
 
         // Getter for the different components, returns nullptr if it doesn't have the component e.g.