mc 4.8.13 compile error

[John Kennerson <nobody isis cpunk us>]

mc 4.8.13 compile error


slackware 13.0 with:
 glib-1.2.10-i486-3
 glib2-2.18.4-i486-1
 glibc-2.9-i486-6_slack13.0

Trying to compile mc 4.8.13 results in the following error:
(mc 4.8.12 compiled fine on the same system)

Making all in widget
make[3]: Entering directory `/home/john/tmp/mc-4.8.13/lib/widget'
make[3]: Nothing to be done for `all'.
make[3]: Leaving directory `/home/john/tmp/mc-4.8.13/lib/widget'
Making all in .
make[3]: Entering directory `/home/john/tmp/mc-4.8.13/lib'
  CC       glibcompat.lo
glibcompat.c: In function 'g_error_new_valist':
glibcompat.c:156: error: 'ap' undeclared (first use in this function)
glibcompat.c:156: error: (Each undeclared identifier is reported only once
glibcompat.c:156: error: for each function it appears in.)
glibcompat.c:156: error: 'va_start' used in function with fixed args
glibcompat.c:151: warning: unused parameter 'args' [-Wunused-parameter]
make[3]: *** [glibcompat.lo] Error 1
make[3]: Leaving directory `/home/john/tmp/mc-4.8.13/lib'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/john/tmp/mc-4.8.13/lib'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/john/tmp/mc-4.8.13'
make: *** [all] Error 2

Any ideas as to the problem?