fixed compile if lua is not enabled

git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.11-ssl-fixes@1300 152afb58-edef-0310-8abb-c4023f1b3aa9

configure.in

@@ -375,7 +375,7 @@ if test "$WITH_MEMCACHE" != "no"; then
 fi
   
 dnl Check for lua
-AC_MSG_CHECKING(for lua)
+AC_MSG_CHECKING(if lua-support is requested)
 AC_ARG_WITH(lua, AC_HELP_STRING([--with-lua],[lua engine for mod_cml]),
 [WITH_LUA=$withval],[WITH_LUA=no])
 
@@ -400,7 +400,7 @@ if test "$WITH_LUA" != "no"; then
 
  if test x"$LUA_LIBS" = x; then
    # try pkgconfig
-   PKG_CHECK_MODULES(LUA, lua, [
+   PKG_CHECK_MODULES(LUA, lua >= 5.1, [
      AC_DEFINE([HAVE_LUA], [1], [liblua])
      AC_DEFINE([HAVE_LUA_H], [1], [lua.h])
    ])
@@ -557,7 +557,7 @@ else
 	no_build="$no_build $plugins"
 fi
 
-plugins="mod_cml"
+plugins="mod_cml mod_magnet"
 if test ! "x$LUA_LIBS" = x; then
 	do_build="$do_build $plugins"
 else

src/mod_magnet.c

@@ -4,9 +4,6 @@
 #include <assert.h>
 #include <setjmp.h>
 
-#include <lua.h>
-#include <lauxlib.h>
-
 #include "base.h"
 #include "log.h"
 #include "buffer.h"
@@ -18,6 +15,9 @@
 #include "stat_cache.h"
 #include "status_counter.h"
 
+#ifdef HAVE_LUA_H
+#include <lua.h>
+#include <lauxlib.h>
 
 #define MAGNET_CONFIG_RAW_URL       "magnet.attract-raw-url-to"
 #define MAGNET_CONFIG_PHYSICAL_PATH "magnet.attract-physical-path-to"
@@ -723,3 +723,9 @@ int mod_magnet_plugin_init(plugin *p) {
 	
 	return 0;
 }
+
+#else
+int mod_magnet_plugin_init(plugin *p) {
+	return -1;
+}
+#endif