Add missing "(void)" to functions to match public headers
diff --git a/src/idevice.c b/src/idevice.c
index ce27495..7c33cdd 100644
--- a/src/idevice.c
+++ b/src/idevice.c
@@ -168,7 +168,7 @@
 	return IDEVICE_E_SUCCESS;
 }
 
-LIBIMOBILEDEVICE_API idevice_error_t idevice_event_unsubscribe()
+LIBIMOBILEDEVICE_API idevice_error_t idevice_event_unsubscribe(void)
 {
 	event_cb = NULL;
 	int res = usbmuxd_unsubscribe();
diff --git a/src/installation_proxy.c b/src/installation_proxy.c
index e858e58..8bde154 100644
--- a/src/installation_proxy.c
+++ b/src/installation_proxy.c
@@ -914,7 +914,7 @@
 	}
 }
 
-LIBIMOBILEDEVICE_API plist_t instproxy_client_options_new()
+LIBIMOBILEDEVICE_API plist_t instproxy_client_options_new(void)
 {
 	return plist_new_dict();
 }
diff --git a/src/mobilesync.c b/src/mobilesync.c
index 06fb1c1..d903cfe 100644
--- a/src/mobilesync.c
+++ b/src/mobilesync.c
@@ -739,7 +739,7 @@
 	anchors = NULL;
 }
 
-LIBIMOBILEDEVICE_API plist_t mobilesync_actions_new()
+LIBIMOBILEDEVICE_API plist_t mobilesync_actions_new(void)
 {
 	return plist_new_dict();
 }