[h323plus] AC_CHECK_FILE "unsuitable" for cross compiling

Can someone please remove the use of AC_CHECK_FILE from configure.ac as it breaks cross compiling.. See: http://opalvoip.svn.sourceforge.net/viewvc/opalvoip/opal/trunk/configure.ac?r1=18796&r2=18818 Regards -- Peter Nixon http://peternixon.net/