adding include for getpid

diff --git a/src/Session/Session_Session_i.cxx b/src/Session/Session_Session_i.cxx
index a5b59bc266e84492908f1baf470afe822df3fdb3..a075efc134e5b70387b5f1878a12233d0ef1598d 100755 (executable)
--- a/src/Session/Session_Session_i.cxx
+++ b/src/Session/Session_Session_i.cxx
@@ -45,6 +45,8 @@
 
 #ifdef WNT
 # include <process.h>
+#else
+#include <unistd.h>
 #endif
 
 /*!