Revert some refcount changes on I/O structs.

These are refcounts on structs, not Tcl_Obj's.  Their scheme doesn't suffer
the same difficulties and histories as Tcl_Obj's, and they need not copy
every detail, appropriate or not, from Tcl_Obj refcount management.
The "significant value" -- as dkf puts it -- for the struct refcounting scheme
is 0 not 1.

1 files changed, 1 insertions, 1 deletions

diff --git a/generic/tclIOGT.c b/generic/tclIOGT.c
index c1ce485..7f61def 100644
--- a/generic/tclIOGT.c
+++ b/generic/tclIOGT.c
@@ -225,7 +225,7 @@ static void
 ReleaseData(
     TransformChannelData *dataPtr)
 {
-    if (dataPtr->refCount-- > 1) {
+    if (--dataPtr->refCount) {
 	return;
     }
     ResultClear(&dataPtr->result);