* configure.ac: Make fix for configure.ac from HEAD.

Author: descender

libvisual-plugins/ChangeLog

@@ -1,3 +1,8 @@
+2006-03-08  Chong Kai Xiong  <descender@phreaker.net>
+
+	* configure.ac: Make configure die if neither Bison nor Yacc
+	could be found.
+
 2006-03-08  Chong Kai Xiong  <descender@phreaker.net>
 
 	* plugins/actor/pseudotoad_flower/Makefile.am: Add missing \,

libvisual-plugins/configure.ac

@@ -69,7 +69,10 @@ AC_PROG_LIBTOOL
 
 dnl Lex/Yacc
 AM_PROG_LEX
-AC_PROG_YACC
+AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc])
+if test -z "$YACC"; then
+   AC_MSG_ERROR([Bison or Yacc not found])
+fi
 
 dnl Internationalization
 GETTEXT_PACKAGE=libvisual-plugins-lv_plugins_version_suffix