File fix_asciidoc_build.patch of Package booth

diff --git a/configure.ac b/configure.ac
index 56df5bd..3bf41b3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -65,8 +65,8 @@ AC_PATH_PROGS(ASCIIDOCTOR, asciidoctor)
 AC_PATH_PROGS(A2X, a2x)
 AC_PATH_PROGS(XML2CONFIG, xml2-config)
 
-AM_CONDITIONAL(IS_ASCIIDOC, test "x{ASCIIDOC}" = "xasciidoc")
-AM_CONDITIONAL(IS_A2X, test "x${A2X}" = "xa2x")
+AM_CONDITIONAL(IS_ASCIIDOC, test x"${ASCIIDOC}" != x"")
+AM_CONDITIONAL(IS_A2X, test x"${A2X}" != x"")
 AM_CONDITIONAL(BUILD_ASCIIDOC, test x"${A2X}" != x"" || test x"${ASCIIDOCTOR}" != x"")
 AM_CONDITIONAL(BUILD_ASCIIDOC_HTML_MAN,
 	       (test "x${ASCIIDOC}" != "x" || test x"${ASCIIDOCTOR}" != x"") && test "x$with_html_man" = "xyes")