[mISDNuser PATCH] Fix handling of file descriptor zero

---
 capi20/application.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/capi20/application.c b/capi20/application.c
index eb21ee7..f7cdc7a 100644
--- a/capi20/application.c
+++ b/capi20/application.c
@@ -38,7 +38,7 @@ static void app_sendcontrol(struct mApplication *appl, int cmd)
 {
 	int ret;
 
-	if (appl->cpipe[1] > 0) {
+	if (appl->cpipe[1] >= 0) {
 		ret = write(appl->cpipe[1], &cmd, sizeof(cmd));
 		if (ret < sizeof(cmd))
 			eprint("%s: refcount %d cannot write cmd=%x to controlpipe(%d) ret=%d - %s\n",
@@ -138,7 +138,8 @@ void ReleaseApplication(struct mApplication *appl, int unregister)
 	ret = pipe2(appl->cpipe, O_NONBLOCK);
 	if (ret)
 		eprint("%s: Cannot open control pipe - %s\n", CAPIobjIDstr(&appl->cobj), strerror(errno));
-	close(appl->fd);
+	if (appl->fd >= 0)
+		close(appl->fd);
 	appl->fd = -1;
 
 	pthread_rwlock_unlock(&appl->cobj.lock);
@@ -193,13 +194,13 @@ void Free_Application(struct mCAPIobj *co)
 	}
 	if (!appl->unregistered) /* filedescriptor was closed */
 		capi_freeapplid(appl->cobj.id2);
-	if (appl->fd > 0)
+	if (appl->fd >= 0)
 		close(appl->fd);
 	appl->fd = -1;
-	if (appl->cpipe[1] > 0)
+	if (appl->cpipe[1] >= 0)
 		close(appl->cpipe[1]);
 	appl->cpipe[1] = -1;
-	if (appl->cpipe[0] > 0)
+	if (appl->cpipe[0] >= 0)
 		close(appl->cpipe[0]);
 	appl->cpipe[0] = -1;
 
@@ -246,7 +247,7 @@ void Put_Application_cleaned(struct mCAPIobj *co)
 {
 	struct mApplication *appl = container_of(co, struct mApplication, cobj);
 
-	if (appl->cobj.cleaned && appl->cpipe[1] > 0)
+	if (appl->cobj.cleaned && appl->cpipe[1] >= 0)
 		app_sendcontrol(appl, MI_PUT_APPLICATION);
 }
 
-- 
1.9.3