Update to box2d 2.4.1

src/libraries/box2d/b2_world_callbacks.h

@@ -23,6 +23,7 @@
 #ifndef B2_WORLD_CALLBACKS_H
 #define B2_WORLD_CALLBACKS_H
 
+#include "b2_api.h"
 #include "b2_settings.h"
 
 struct b2Vec2;
@@ -37,7 +38,7 @@ struct b2Manifold;
 /// Joints and fixtures are destroyed when their associated
 /// body is destroyed. Implement this listener so that you
 /// may nullify references to these joints and shapes.
-class b2DestructionListener
+class B2_API b2DestructionListener
 {
 public:
 	virtual ~b2DestructionListener() {}
@@ -53,7 +54,7 @@ public:
 
 /// Implement this class to provide collision filtering. In other words, you can implement
 /// this class if you want finer control over contact creation.
-class b2ContactFilter
+class B2_API b2ContactFilter
 {
 public:
 	virtual ~b2ContactFilter() {}
@@ -66,7 +67,7 @@ public:
 /// Contact impulses for reporting. Impulses are used instead of forces because
 /// sub-step forces may approach infinity for rigid body collisions. These
 /// match up one-to-one with the contact points in b2Manifold.
-struct b2ContactImpulse
+struct B2_API b2ContactImpulse
 {
 	float normalImpulses[b2_maxManifoldPoints];
 	float tangentImpulses[b2_maxManifoldPoints];
@@ -82,7 +83,7 @@ struct b2ContactImpulse
 /// You should strive to make your callbacks efficient because there may be
 /// many callbacks per time step.
 /// @warning You cannot create/destroy Box2D entities inside these callbacks.
-class b2ContactListener
+class B2_API b2ContactListener
 {
 public:
 	virtual ~b2ContactListener() {}
@@ -124,7 +125,7 @@ public:
 
 /// Callback class for AABB queries.
 /// See b2World::Query
-class b2QueryCallback
+class B2_API b2QueryCallback
 {
 public:
 	virtual ~b2QueryCallback() {}
@@ -136,7 +137,7 @@ public:
 
 /// Callback class for ray casts.
 /// See b2World::RayCast
-class b2RayCastCallback
+class B2_API b2RayCastCallback
 {
 public:
 	virtual ~b2RayCastCallback() {}