IN
	cl_int enqueueAcquireGLObjects(
         const VECTOR_CLASS<Memory>* mem_objects = NULL,
         const VECTOR_CLASS<Event>* events = NULL,
         Event* event = NULL) const
     {
		 return detail::errHandler(
			 ::clEnqueueAcquireGLObjects(
			 object_,
			 (mem_objects != NULL) ? (cl_uint) mem_objects->size() : 0,
			 (mem_objects != NULL && mem_objects->size() > 0 ) ? (const cl_mem *) &mem_objects->front() : NULL,
			 (events != NULL) ? (cl_uint) events->size() : 0,
			 (events != NULL && events->size() > 0) ? (cl_event*) &events->front() : NULL,
                 (cl_event*) event),
             __ENQUEUE_ACQUIRE_GL_ERR);
     }

the line
(mem_objects != NULL ) ? (const cl_mem *) &mem_objects->front() : NULL,
should be
(mem_objects != NULL && mem_objects->size() > 0 ) ? (const cl_mem *) &mem_objects->front() : NULL,

this happen in a bunch of other members

Thanks Maa