Rev 1.13 did not fix the build with Heimdal 1.5.x because the
extra include files required by the updated <com_err.h> were
guarded by "#if HAVE_COM_ERR_H", which configure does not define
when compiling the test program. There was also an extra inclusion
of <com_err.h> inside the #if/#endif block. For some odd reason, a number
of the other include file tests in the configure script are written
with an extra #include, but it is harmless in those cases because the
#if conditions are not met.
Remove the #if test and the redundant include from the test program for
<com_err.h>. Make a similar fix to the test for <et/com_err.h>.
Reviewed by: mezz