add header for ustring to vst_plugin.h

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@3383 d708f5d6-7413-0410-9779-e7cbd77b26cf

diff --git a/libs/ardour/vst_plugin.cc b/libs/ardour/vst_plugin.cc
index b92cad853ab0a6d10a899aaab35f3ebec535fdde..edbf773e21caadc8867b8d1567b5160d95ca5821 100644 (file)
--- a/libs/ardour/vst_plugin.cc
+++ b/libs/ardour/vst_plugin.cc
@@ -30,6 +30,7 @@
 #include <sys/stat.h>
 #include <cerrno>
 
+#include <glibmm/ustring.h>
 #include <glibmm/miscutils.h>
 
 #include <lrdf.h>