Merged from SRTP branch: added stdint.h header detection in autoconf. Result is in PJ_HAS_STDINT_H macro

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@1729 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/aconfigure.ac b/aconfigure.ac
index 5a5235c..011fa1d 100644
--- a/aconfigure.ac
+++ b/aconfigure.ac
@@ -149,6 +149,7 @@
 AC_CHECK_HEADER(stdarg.h,[AC_DEFINE(PJ_HAS_STDARG_H,1)])
 AC_CHECK_HEADER(stddef.h,[AC_DEFINE(PJ_HAS_STDDEF_H,1)])
 AC_CHECK_HEADER(stdio.h,[AC_DEFINE(PJ_HAS_STDIO_H,1)])
+AC_CHECK_HEADER(stdint.h,[AC_DEFINE(PJ_HAS_STDINT_H,1)])
 AC_CHECK_HEADER(stdlib.h,[AC_DEFINE(PJ_HAS_STDLIB_H,1)])
 AC_CHECK_HEADER(string.h,[AC_DEFINE(PJ_HAS_STRING_H,1)])
 AC_CHECK_HEADER(sys/ioctl.h,[AC_DEFINE(PJ_HAS_SYS_IOCTL_H,1)])