1 files changed, 5 insertions, 3 deletions

diff --git a/apps/plugins/lua/lzio.h b/apps/plugins/lua/lzio.h
index 441f7479cb..9aa9e4b537 100644
--- a/apps/plugins/lua/lzio.h
+++ b/apps/plugins/lua/lzio.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.h,v 1.26.1.1 2013/04/12 18:48:47 roberto Exp $
+** $Id$
 ** Buffered streams
 ** See Copyright Notice in lua.h
 */
@@ -17,8 +17,9 @@
 
 typedef struct Zio ZIO;
 
-#define zgetc(z)  (((z)->n--)>0 ?  cast_uchar(*(z)->p++) : luaZ_fill(z))
+#define char2int(c)     cast(int, cast(unsigned char, (c)))
 
+#define zgetc(z)  (((z)->n--)>0 ?  char2int(*(z)->p++) : luaZ_fill(z))
 
 typedef struct Mbuffer {
   char *buffer;
@@ -46,6 +47,7 @@ LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
 LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
                                         void *data);
 LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */
+LUAI_FUNC int luaZ_lookahead (ZIO *z);
 
 
 
@@ -54,7 +56,7 @@ LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n);	/* read next n bytes */
 struct Zio {
   size_t n;                     /* bytes still unread */
   const char *p;                /* current position in buffer */
-  lua_Reader reader;            /* reader function */
+  lua_Reader reader;
   void* data;                   /* additional data */
   lua_State *L;                 /* Lua state (for reader) */
 };