os/FuseStore: include <functional> header in src/os/FuseStore.h for gcc 7.x

This is done as per the Header Dependency Changes in gcc 7.
https://gcc.gnu.org/gcc-7/porting_to.html

Signed-off-by: Jos Collin <jcollin@redhat.com>

diff --git a/src/os/FuseStore.h b/src/os/FuseStore.h
index bb9e59f5f45915c93f338f1139a5e98eff9ec646..04681e645c20b7cba35fdb2acb4727893fd3a5be 100644 (file)
--- a/src/os/FuseStore.h
+++ b/src/os/FuseStore.h
@@ -7,6 +7,7 @@
 #include <string>
 #include <map>
 #include <mutex>
+#include <functional>
 
 #include "common/Thread.h"
 #include "include/buffer.h"