fix issue 220: implicit declaration of function ‘isatty’
Fixes warning:
converter-example.c: In function ‘main’:
converter-example.c:400:8: warning: implicit declaration of function ‘isatty’ [-Wimplicit-function-declaration]
if(isatty(1)) {
^
diff --git a/skeletons/converter-example.c b/skeletons/converter-example.c
index 2e7e193..5c86d4b 100644
--- a/skeletons/converter-example.c
+++ b/skeletons/converter-example.c
@@ -18,7 +18,7 @@
#include <string.h> /* for strerror(3) */
#include <sysexits.h> /* for EX_* exit codes */
#include <errno.h> /* for errno */
-
+#include <unistd.h> /* for isatty(3) */
#include <asn_application.h>
#include <asn_internal.h> /* for ASN__DEFAULT_STACK_MAX */