remove useless cast

values are already pointers, no need to cast them to void *

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

migration-exec.c

@@ -141,8 +141,7 @@ int exec_start_incoming_migration(const char *command)
     }
 
     qemu_set_fd_handler2(qemu_stdio_fd(f), NULL,
-			 exec_accept_incoming_migration, NULL,
-			 (void *)(unsigned long)f);
+			 exec_accept_incoming_migration, NULL, f);
 
     return 0;
 }