added CHECK_EOF to work around warnings about EOF and -1 being the same (#2254)

Co-authored-by: Andreas Baumann <mail@andreasbaumann.cc>

1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/check_tcp.c b/plugins/check_tcp.c
index cd8e04b0..924322e4 100644
--- a/plugins/check_tcp.c
+++ b/plugins/check_tcp.c
@@ -562,7 +562,7 @@ static check_tcp_config_wrapper process_arguments(int argc, char **argv, check_t
                 int option_index =
                         getopt_long(argc, argv, "+hVv46EAH:s:e:q:m:c:w:t:p:C:W:d:Sr:jD:M:", longopts, &option);
 
-                if (option_index == -1 || option_index == EOF || option_index == 1) {
+                if (CHECK_EOF(option_index) || option_index == 1) {
                         break;
                 }