forward port VST parameter name fix from mixbus: some/many VST plugins expect the...

diff --git a/libs/ardour/vst_plugin.cc b/libs/ardour/vst_plugin.cc
index 3885bc2a1cab8fd2c42bf302495bab952d202e90..c385e71a5af0393a90fcf7f936d5690832ec62b9 100644 (file)
--- a/libs/ardour/vst_plugin.cc
+++ b/libs/ardour/vst_plugin.cc
@@ -295,10 +295,11 @@ VSTPlugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc)
                /* old style */
 
                char label[64];
-               label[0] = '\0';
+               /* some VST plugins expect this buffer to be zero-filled */
+               memset (label, sizeof (label), 0);
 
                _plugin->dispatcher (_plugin, effGetParamName, which, 0, label, 0);
-
+               
                desc.label = label;
                desc.integer_step = false;
                desc.lower = 0.0f;
@@ -482,8 +483,17 @@ VSTPlugin::do_remove_preset (string name)
 string 
 VSTPlugin::describe_parameter (Evoral::Parameter param)
 {
-       char name[64] = "Unkown";
+       char name[64];
+       memset (name, sizeof (name), 0);
+
+       /* some VST plugins expect this buffer to be zero-filled */
+
        _plugin->dispatcher (_plugin, effGetParamName, param.id(), 0, name, 0);
+
+       if (name[0] == '\0') {
+               strcpy (name, _("Unknown"));
+       }
+
        return name;
 }