#define IS_NEW_FRAME(f, g) (IS_ANIMATED(g) && IS_NEW_DELAY(f, g))
#define IS_NEXT_FRAME(f, g) (IS_NEW_FRAME(f, g) && (f) > 0)
-#define IS_LOOP_SOUND(s) (sound_info[s].loop)
-#define IS_LOOP_MUSIC(s) (music_info[s].loop)
+#define IS_LOOP_SOUND(s) ((s) >= 0 && sound_info[s].loop)
+#define IS_LOOP_MUSIC(s) ((s) < 0 || music_info[s].loop)
#define IS_SPECIAL_GFX_ARG(a) ((a) >= 0 && (a) < NUM_SPECIAL_GFX_ARGS)
// program information and versioning definitions
#define PROGRAM_VERSION_SUPER 4
#define PROGRAM_VERSION_MAJOR 3
-#define PROGRAM_VERSION_MINOR 1
+#define PROGRAM_VERSION_MINOR 2
#define PROGRAM_VERSION_PATCH 0
#define PROGRAM_VERSION_EXTRA ""
#define PROGRAM_AUTHOR_STRING "Holger Schemel"
#define PROGRAM_EMAIL_STRING "info@artsoft.org"
#define PROGRAM_WEBSITE_STRING "https://www.artsoft.org/"
-#define PROGRAM_COPYRIGHT_STRING "Copyright \xa9""1995-2021 by Holger Schemel"
+#define PROGRAM_COPYRIGHT_STRING "Copyright \xa9""1995-2022 by Holger Schemel"
#define PROGRAM_COMPANY_STRING "A Game by Artsoft Entertainment"
#define PROGRAM_ICON_FILENAME "RocksIcon32x32.png"
extern int GfxRandom[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern int GfxRandomStatic[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern int GfxElement[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
+extern int GfxElementEmpty[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern int GfxAction[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern int GfxDir[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern int GfxRedraw[MAX_LEV_FIELDX][MAX_LEV_FIELDY];