Fix 'missing' configure warning

configure.ac

@@ -2,8 +2,9 @@ AC_INIT([mod_maxminddb], [1.0.0], [support@maxmind.com])
 AC_ARG_WITH(apxs, AC_HELP_STRING([--with-apxs=NAME],
             [name of your apxs executable [[apxs]]]),
             [APXS="$with_apxs"])
-AC_PROG_CC_C99
 AC_CONFIG_AUX_DIR([.])
+AM_INIT_AUTOMAKE
+AC_PROG_CC_C99
 if test -z "${APXS}"; then
     AC_PATH_PROGS(APXS, apxs2 apxs, no, [$PATH:/usr/sbin:/usr/local/apache2/bin])
 fi
@@ -18,6 +19,5 @@ AC_CHECK_LIB(maxminddb, MMDB_lib_version, [
     AC_SUBST(LIBMAXMINDDB_LDFLAGS)
     ],
     [AC_MSG_ERROR([libmaxminddb was not found])])
-AM_INIT_AUTOMAKE
 AC_CONFIG_FILES([Makefile src/Makefile])
 AC_OUTPUT