avoid to use 0 instead of NULL

diff --git a/src/main.c b/src/main.c
index e9ac03f..5ca03aa 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -372,12 +372,12 @@ static void log_init()
 }
 
 static struct option long_options[] = {
-       {"version", no_argument, 0, 'v'},
-       {"help", no_argument, 0, 'h'},
-       {"url", required_argument, 0, 'u'},
-       {"debug", required_argument, 0, 'd'},
-       {"new-instance", no_argument, 0, 'n'},
-       {0, 0, 0, 0}
+       {"version", no_argument, NULL, 'v'},
+       {"help", no_argument, NULL, 'h'},
+       {"url", required_argument, NULL, 'u'},
+       {"debug", required_argument, NULL, 'd'},
+       {"new-instance", no_argument, NULL, 'n'},
+       {NULL, 0, NULL, 0}
 };
 
 static gboolean initial_window_show(gpointer data)