lua: add compatibility to lua 5.3 and 5.4; copy from https://github.com/SteveKChiu/lua-intf/blob/master/LuaIntf/LuaCompat.h

src/gui/lua/lua_cc_text.cpp

@@ -37,6 +37,15 @@
 #include "lua_cc_window.h"
 #include "lua_cc_text.h"
 
+
+#if LUA_VERSION_NUM >= 503 /* Lua 5.3 */
+
+#ifndef luaL_checkint
+# define luaL_checkint luaL_checkinteger
+#endif
+
+#endif /* Lua 5.3 */
+
 CLuaInstCCText* CLuaInstCCText::getInstance()
 {
 	static CLuaInstCCText* LuaInstCCText = NULL;

src/gui/lua/lua_cc_window.cpp

@@ -33,6 +33,14 @@
 #include "luainstance.h"
 #include "lua_cc_window.h"
 
+#if LUA_VERSION_NUM >= 503 /* Lua 5.3 */
+
+#ifndef luaL_checkint
+#define luaL_checkint luaL_checkinteger
+#endif
+
+#endif /* Lua 5.3 */
+
 CLuaInstCCWindow* CLuaInstCCWindow::getInstance()
 {
 	static CLuaInstCCWindow* LuaInstCCWindow = NULL;

src/gui/lua/lua_configfile.cpp

@@ -30,6 +30,14 @@
 #include "luainstance.h"
 #include "lua_configfile.h"
 
+#if LUA_VERSION_NUM >= 503 /* Lua 5.3 */
+
+#ifndef luaL_checkint
+#define luaL_checkint luaL_checkinteger
+#endif
+
+#endif /* Lua 5.3 */
+
 CLuaInstConfigFile* CLuaInstConfigFile::getInstance()
 {
 	static CLuaInstConfigFile* LuaInstConfigFile = NULL;

src/gui/lua/lua_filehelpers.cpp

@@ -35,6 +35,14 @@
 #include "luainstance.h"
 #include "lua_filehelpers.h"
 
+#if LUA_VERSION_NUM >= 503 /* Lua 5.3 */
+
+#ifndef luaL_checkint
+#define luaL_checkint luaL_checkinteger
+#endif
+
+#endif /* Lua 5.3 */
+
 CLuaInstFileHelpers* CLuaInstFileHelpers::getInstance()
 {
 	static CLuaInstFileHelpers* LuaInstFileHelpers = NULL;

src/gui/lua/lua_misc.cpp

@@ -40,6 +40,14 @@
 /* autogenerated from luainstance.h */
 #include "lua_api_version.h"
 
+#if LUA_VERSION_NUM >= 503 /* Lua 5.3 */
+
+#ifndef luaL_checkint
+#define luaL_checkint luaL_checkinteger
+#endif
+
+#endif /* Lua 5.3 */
+
 extern CVolume* g_volume;
 
 CLuaInstMisc* CLuaInstMisc::getInstance()

src/gui/lua/luainstance.cpp

@@ -62,6 +62,33 @@
 /* autogenerated from luainstance.h */
 #include "lua_api_version.h"
 
+#if LUA_VERSION_NUM >= 503 /* Lua 5.3 */
+
+	#ifndef luaL_checkint
+		# define luaL_checkint luaL_checkinteger
+	#endif
+
+	#ifndef lua_pushunsigned
+		#define lua_pushunsigned(L, n) \
+		lua_pushinteger(L, static_cast<lua_Integer>(n))
+
+		#define lua_tounsignedx(L, i, is) \
+		static_cast<lua_Unsigned>(lua_tointegerx(L, i, is))
+
+		#define lua_tounsigned(L, i) \
+		lua_tounsignedx(L, (i), nullptr)
+	#endif
+
+	#ifndef luaL_checkunsigned
+		#define luaL_checkunsigned(L, a) \
+		static_cast<lua_Unsigned>(luaL_checkinteger(L, a))
+
+		#define luaL_optunsigned(L, a, d) \
+		static_cast<lua_Unsigned>(luaL_optinteger(L, a, static_cast<lua_Integer>(d)))
+	#endif
+
+#endif /* Lua 5.3 */
+
 extern CPictureViewer *g_PicViewer;
 extern cVideo *videoDecoder;