DOS ain't dead

On 29 November 2017, the NASM developers released 2.13.02.

Home page: http://www.nasm.us/
Download: http://www.nasm.us/pub/nasm/releasebuilds/2.13.02/dos/
Changelog: http://www.nasm.us/doc/nasmdocc.html

Partial list of recent changes:
* Fix false positive in testing of numeric overflows
* Fix generation of PEXTRW instruction
* Fix smartalign package which could trigger an error during optimization if the alignment code expanded too much due to optimization of the previous code
* Fix a case where negative value in TIMES directive causes panic instead of an error
* Always finalize .debug_abbrev section with a null in dwarf output format
* Fix missing update of global BITS setting if SECTION directive specified a bit size using output format-specific extensions (e.g. USE32 for the obj output format)
* Fix the incorrect generation of VEX-encoded instruction when static mode decorators are specified on scalar instructions, losing the decorators as they require EVEX encoding
* Option -MW to quote dependency outputs according to Watcom Make conventions instead of POSIX Make conventions. See section 2.1.11
* The obj output format now contains embedded dependency file information, unless disabled with %pragma obj nodepend. See section 7.4.9
* Fix generation of dependency lists
* Fix a number of null pointer reference and memory allocation errors