[CMake] RC compilation failing

[Gonzalo Garramuño]

I had a resource.rc file and a resource.h file with just an ICON to 
provide the icon to my application.  However, since a week or so ago, RC 
refuses to compile it, giving the not very helpful message:

Microsoft (R) Windows (R) Resource Compiler Version 6.3.9600.17336
Copyright (C) Microsoft Corporation.  All rights reserved.

RC : fatal error RW1023: I/O error seeking in file

According to the MSDEV pages that means I don't have disk space, but 
that's not true.  I checked permissions too and that seemed okay too.

-- 
Gonzalo Garramuño