zdtm: initialize shared memory before fork

Otherwise this memory are initialized from parent and child,
but parent may initialize, when a child has written a useful data.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/live/static/file_fown.c

@@ -116,15 +116,14 @@ int main(int argc, char ** argv)
 
 	ppid = getpid();
 
-	pid = test_fork();
+	MAP_SYNC(map) = 0;
 
+	pid = test_fork();
 	if (pid < 0) {
 		err("can't fork %m");
 		exit(1);
 	}
 
-	MAP_SYNC(map) = 0;
-
 	if (pid == 0) {
 		int v = 1;