Solve minor bug in metacall fork declaration.
@@ -219,9 +219,7 @@ pid_t metacall_fork_hook()
# error "Unknown metacall fork safety platform"
#endif
-static void metacall_fork_exit(void);
-
-void metacall_fork_exit()
+static void metacall_fork_exit(void)
{
if (metacall_fork_destroy() != 0)
{
