ports/security/opensc does not build

[knowtree at aloha.com]

Build cannot find an X11 header, but the file is on my system. Must be a
problem with the path used for the include statement.

5.4-STABLE FreeBSD 5.4-STABLE #3: Mon Jan  9 13:18:34 HST 2006

..
gmake[4]: Entering directory
`/usr/ports/security/opensc/work/opensc-0.9.6/src/signer'
/bin/sh /usr/local/bin/libtool15 --mode=compile cc -DHAVE_CONFIG_H -I. -I.
-I../.. -I../../src/include  -I/usr/local/include 
-I../../src/signer/npinclude  -I../../src/include  -I/usr/local/include 
-DXP_UNIX -Wall -fno-strict-aliasing -O -pipe  -D_THREAD_SAFE  -c -o
opensc_signer_la-opensc-crypto.lo `test -f 'opensc-crypto.c' || echo
'./'`opensc-crypto.c
 cc -DHAVE_CONFIG_H -I. -I. -I../.. -I../../src/include
-I/usr/local/include -I../../src/signer/npinclude -I../../src/include
-I/usr/local/include -DXP_UNIX -Wall -fno-strict-aliasing -O -pipe
-D_THREAD_SAFE -c opensc-crypto.c  -fPIC -DPIC -o
.libs/opensc_signer_la-opensc-crypto.o
In file included from opensc-crypto.c:1:
signer.h:7:27: X11/Intrinsic.h: No such file or directory
gmake[4]: *** [opensc_signer_la-opensc-crypto.lo] Error 1
gmake[4]: Leaving directory
`/usr/ports/security/opensc/work/opensc-0.9.6/src/signer'
gmake[3]: *** [all-recursive] Error 1
gmake[3]: Leaving directory
`/usr/ports/security/opensc/work/opensc-0.9.6/src/signer'
gmake[2]: *** [all-recursive] Error 1
gmake[2]: Leaving directory `/usr/ports/security/opensc/work/opensc-0.9.6/src'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/usr/ports/security/opensc/work/opensc-0.9.6'
gmake: *** [all] Error 2
*** Error code 2

Stop in /usr/ports/security/opensc.

locate Intrinsic.h
/usr/X11R6/include/X11/Intrinsic.h

ll /usr/X11R6/include/X11/Intrinsic.h
-r--r--r--  1 root  wheel  62642 Apr  3  2005
/usr/X11R6/include/X11/Intrinsic.h