core plugin: abbreviate 'IS_CLUSTER' macro

diff --git a/plugin/core/gvrender_core_json.c b/plugin/core/gvrender_core_json.c
index dfb7b258745ae3c6cfc7296da20bf27a4764ca0b..7b75a4f2b6a7b1ef39ec33b59da19df187071105 100644 (file)
--- a/plugin/core/gvrender_core_json.c
+++ b/plugin/core/gvrender_core_json.c
@@ -28,6 +28,7 @@
 #include <gvc/gvplugin_device.h>
 #include <cgraph/agxbuf.h>
 #include <cgraph/alloc.h>
+#include <cgraph/startswith.h>
 #include <cgraph/unreachable.h>
 #include <common/utils.h>
 #include <gvc/gvc.h>
@@ -57,7 +58,7 @@ typedef struct {
 #define ED_gid(n) (((gvid_t*)aggetrec(n, ID, FALSE))->id) 
 #define GD_gid(n) (((gvid_t*)aggetrec(n, ID, FALSE))->id) 
 
-#define IS_CLUSTER(s) (!strncmp(agnameof(s), "cluster", 7))
+#define IS_CLUSTER(s) startswith(agnameof(s), "cluster")
 
 static void json_begin_graph(GVJ_t *job)
 {