reserve: update from upstream git repo

src/modules/reserve-monitor.h

@@ -1,3 +1,5 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: t -*-*/
+
 #ifndef fooreservemonitorhfoo
 #define fooreservemonitorhfoo
 
@@ -28,6 +30,10 @@
 #include <dbus/dbus.h>
 #include <inttypes.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct rm_monitor rm_monitor;
 
 /* Prototype for a function that is called whenever the reservation
@@ -59,4 +65,8 @@ void rm_set_userdata(rm_monitor *m, void *userdata);
  * userdata was set. */
 void* rm_get_userdata(rm_monitor *m);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif