Do not allow bombs to be used as trigger objects.

Author: daid

src/bomb.h

@@ -13,6 +13,7 @@ class Bomb : public PhysicsObject
 
     virtual void setProperty(sp::string name, sp::string value) override;
 
+    virtual bool isTriggerSource() override { return false; }
 private:
     double velocity_average = 0.0;
     enum class State

src/physicsObject.h

@@ -13,6 +13,8 @@ class PhysicsObject : public LevelObject
     virtual void setProperty(sp::string name, sp::string value) override;
 
     bool isGoal() { return is_goal; }
+
+    virtual bool isTriggerSource() { return true; }
 private:
     bool is_goal = false;
 };

src/trigger.cpp

@@ -28,8 +28,11 @@ void Trigger::onFixedUpdate()
         else if (source == "OBJECT")
         {
             for(auto obj : getParent()->getChildren())
-                if (sp::P<PhysicsObject>(sp::P<sp::Node>(obj)))
+            {
+                sp::P<PhysicsObject> po = sp::P<sp::Node>(obj);
+                if (po && po->isTriggerSource())
                     source_objects.add(obj);
+            }
         }
         else
         {