ANSIfication step 2: make sure all needed prototypes are available, and all needed
header files included.
diff --git a/Mac/Compat/sync.c b/Mac/Compat/sync.c
index a6487e1..944ba23 100644
--- a/Mac/Compat/sync.c
+++ b/Mac/Compat/sync.c
@@ -6,7 +6,7 @@
 #include "macdefs.h"
 
 int
-sync()
+sync(void)
 {
 	if (FlushVol((StringPtr)0, 0) == noErr)
 		return 0;