fix a -Wformat

diff --git a/libs/ardour/vst_plugin.cc b/libs/ardour/vst_plugin.cc
index 9ebc80fd83b7e364e081f397c88ed48ae658b75e..2b3a98d3c85c8292ab7addcb5a6c0807356a5bf2 100644 (file)
--- a/libs/ardour/vst_plugin.cc
+++ b/libs/ardour/vst_plugin.cc
@@ -472,7 +472,7 @@ VSTPlugin::do_save_preset (string name)
        XMLNode* p = 0;
 
        char tmp[32];
-       snprintf (tmp, 31, "%d", _presets.size() + 1);
+       snprintf (tmp, 31, "%ld", _presets.size() + 1);
        tmp[31] = 0;
 
        char hash[41];