Solved a bug when calling the close() function recursively.

src/can/can.cpp

@@ -397,13 +397,13 @@ void CCAN::clear_id_filters(void)
 void CCAN::close(void)
 {
   if(this->can_socket_fd!=-1)
-    this->close();
+    CComm::close();
 }
 
 CCAN::~CCAN()
 {
   // close the can device
   if(this->can_socket_fd!=-1)
-    this->close();
+    CComm::close();
 }