avoid garbage in xchat_pluginpref_list

src/common/plugin.c

@@ -1812,6 +1812,7 @@ xchat_pluginpref_list (xchat_plugin *pl, char* dest)
 	}
 	else													/* existing config file, get list of settings */
 	{
+		strcpy (dest, "");									/* clean up garbage */
 		while (fscanf (fpIn, " %[^\n]", &buffer) != EOF)	/* read whole lines including whitespaces */
 		{
 			token = strtok (buffer, "=");