Small WorldEntity tweaks.

src/worldentity.cpp

@@ -28,6 +28,7 @@ WorldEntity::WorldEntity()
     m_position = vec3(0);
     m_rotation = quat(1);
     m_velocity = vec3(0);
+	m_rotation_velocity = vec3(0);
     m_bbox[0] = m_bbox[1] = vec3(0);
 
     m_mousepos = ivec2(0);

src/worldentity.h

@@ -27,6 +27,7 @@ public:
     vec3 m_position;
     vec3 m_velocity;
     quat m_rotation;
+    vec3 m_rotation_velocity;
     vec3 m_bbox[2];
 
     ivec2 m_mousepos;