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_fping.c b/plugins/check_fping.c
index 6160c2cb..86ef64a4 100644
--- a/plugins/check_fping.c
+++ b/plugins/check_fping.c
@@ -361,7 +361,7 @@ check_fping_config_wrapper process_arguments(int argc, char **argv) {
                 int option_index =
                         getopt_long(argc, argv, "+hVvaH:S:c:w:b:n:T:i:I:M:R:46", longopts, &option);
 
-                if (option_index == -1 || option_index == EOF || option_index == 1) {
+                if (CHECK_EOF(option_index) || option_index == 1) {
                         break;
                 }