bug#16303: Assertion failure in Fset_default_file_modes

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Mon, 30 Dec 2013 16:48:20 +0100
> 
> Normal use, not from -Q
> 
> Program received signal SIGTRAP, Trace/breakpoint trap.
> [Switching to Thread 12260.0x21e4]
> 0x76b5321a in KERNELBASE!DeleteAce () from C:\Windows\syswow64\KernelBase.dll
> (gdb) bt
> #0  0x76b5321a in KERNELBASE!DeleteAce () from
> C:\Windows\syswow64\KernelBase.dll
> #1  0x011fb466 in emacs_abort () at w32fns.c:8419
> #2  0x010efd56 in terminate_due_to_signal (sig=22,
> backtrace_limit=2147483647) at emacs.c:378
> #3  0x01161af9 in die (msg=0x14975f8 "oldumask == oldrealmask",
> file=0x1496ee7 "fileio.c", line=3173) at alloc.c:6760
> #4  0x01132f9e in Fset_default_file_modes (mode=2044) at fileio.c:3173

Exact duplicate of 16299.

I'm working on a fix.