Build comm-central error "error C2371: 'int8_t' : redefinition; different basic types"

[Decathlon]

I'm trying to build Lightning on Windows 7 from comm-central
repository.
Last time I built Thunderbird with calendar enabled was more than a
year ago and everything was fine. Now I updated Python to version
2.7.3 and build with the same procedure with both commands "make -f
client.mk build" and "python ../build/pymake/make.py -f ../
client.mk" (according to https://developer.mozilla.org/en-US/docs/Gmake_vs._Pymake)
but in both cases, after 4 hours(!) the build process stops with the
error:

c:\xxx\comm-central\objdir-tb-release\mozilla\dist\include\harfbuzz
\hb-common.h
(56) : error C2371: 'int8_t' : redefinition; different basic types
c:\xxx\comm-central\objdir-tb-release\mozilla\dist\include
\mozilla/MSSt
dInt.h(82) : see declaration of 'int8_t'

Does anyone have a suggestion?

I'm using VC9 and SDK 7.0
The .mozconfig file contains the following lines:

ac_add_options --enable-application=mail
ac_add_options --enable-calendar
ac_add_options --disable-accessibility
ac_add_options --disable-webgl
mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/objdir-tb-release
mk_add_options MOZILLA_DIR=@TOPSRCDIR@/mozilla