Add a --enable-lua switch to enable LUA support

src/gui/plugins.h

@@ -51,8 +51,12 @@ class CPlugins
 		P_TYPE_DISABLED = 0x1,
 		P_TYPE_GAME     = 0x2,
 		P_TYPE_TOOL     = 0x4,
-		P_TYPE_SCRIPT   = 0x8,
+		P_TYPE_SCRIPT   = 0x8
+
+#if ENABLE_LUA
+		,
 		P_TYPE_LUA      = 0x10
+#endif
 	}
 	p_type_t;
 
@@ -123,8 +127,9 @@ class CPlugins
 		void startPlugin(int number,int param);
 		void start_plugin_by_name(const std::string & filename,int param);// start plugins by "name=" in .cfg
 		void startScriptPlugin(int number);
+#if ENABLE_LUA
 		void startLuaPlugin(int number);
-
+#endif
 		void startPlugin(const char * const filename); // start plugins also by name
 		bool hasPlugin(CPlugins::p_type_t type);