From dcdaa6c7ad7a59628b87c134ba8c3c3792deb9a2 Mon Sep 17 00:00:00 2001
From: Martin <mluessi@gmail.com>
Date: Thu, 16 Mar 2017 11:26:14 -0400
Subject: [PATCH] IO: handle NONE (NULL) io pin

---
 src/main/drivers/io.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/main/drivers/io.c b/src/main/drivers/io.c
index 0390a0add2..219d97ddfd 100644
--- a/src/main/drivers/io.c
+++ b/src/main/drivers/io.c
@@ -238,6 +238,8 @@ void IOToggle(IO_t io)
 // claim IO pin, set owner and resources
 void IOInit(IO_t io, resourceOwner_e owner, uint8_t index)
 {
+    if (!io)
+        return;
     ioRec_t *ioRec = IO_Rec(io);
     ioRec->owner = owner;
     ioRec->index = index;
@@ -245,12 +247,16 @@ void IOInit(IO_t io, resourceOwner_e owner, uint8_t index)
 
 void IORelease(IO_t io)
 {
+    if (!io)
+        return;
     ioRec_t *ioRec = IO_Rec(io);
     ioRec->owner = OWNER_FREE;
 }
 
 resourceOwner_e IOGetOwner(IO_t io)
 {
+    if (!io)
+        return OWNER_FREE;
     ioRec_t *ioRec = IO_Rec(io);
     return ioRec->owner;
 }