Improve the uint32_t check.

src/libraries/libisc-new/configure.in

@@ -19,7 +19,7 @@ dnl Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 dnl Process this file with autoconf to produce a configure script.
 
-AC_REVISION($Revision: 1.15 $)dnl
+AC_REVISION($Revision: 1.16 $)dnl
 AC_PREREQ(2.53)
 AC_INIT(isc, 1.01)
 AC_CONFIG_SRCDIR([src/isc_master.c])
@@ -61,7 +61,7 @@ dnl Checks for libraries.
 dnl Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS(stdlib.h stdarg.h stddef.h string.h sys/select.h unistd.h)
-AC_CHECK_HEADERS(sys/time.h)
+AC_CHECK_HEADERS(sys/time.h stdint.h)
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AM_PROG_CC_STDC
@@ -95,6 +95,12 @@ then]
 dnl
 AC_CHECK_TYPE([uint32_t],AC_DEFINE([HAVE_UINT32_T]),,[
 #include <limits.h>
+#ifdef HAVE_STDINT_H
+#  include <stdint.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>
+#endif
 ])
 [if test $ac_cv_type_uint32_t = no
 then]