Fix bug: close crash without open device.

1 files changed, 4 insertions, 2 deletions

diff --git a/vfd.c b/vfd.c
index 6380fd4..c77fe69 100644
--- a/vfd.c
+++ b/vfd.c
@@ -266,8 +266,10 @@ const char *cVFDQueue::usberror(int ret) const
 
 cVFD::cVFD() 
 {
-	this->pFont = NULL;
-	this->lastIconState = 0;
+  pFont = NULL;
+  lastIconState = 0;
+  framebuf = NULL;
+  backingstore = NULL;
 }
 
 cVFD::~cVFD() {