added missing header include

git-svn-id: svn://localhost/ardour2/branches/3.0@13150 d708f5d6-7413-0410-9779-e7cbd77b26cf

diff --git a/libs/ardour/worker.cc b/libs/ardour/worker.cc
index d48ac959ba5b80a00877e8778936ce7456c43a6f..b13398c69d9aabab1d4839cd5178ff460242fcdd 100644 (file)
--- a/libs/ardour/worker.cc
+++ b/libs/ardour/worker.cc
@@ -18,6 +18,7 @@
 */
 
 #include <stdlib.h>
+#include <unistd.h>
 
 #include "ardour/worker.h"
 #include "pbd/error.h"