Fix debug build as C (#566)

* Clean up todo

* Fix debug build

Source/debug.cpp

@@ -95,7 +95,9 @@ void __cdecl TakeGoldCheat()
 
 void __cdecl MaxSpellsCheat()
 {
-	for (int i = 1; i < MAX_SPELLS; i++) {
+	int i;
+
+	for (i = 1; i < MAX_SPELLS; i++) {
 		if (spelldata[i].sBookLvl != -1) {
 			plr[myplr]._pMemSpells |= (__int64)1 << (i - 1);
 			plr[myplr]._pSplLvl[i] = 10;

Source/sound.cpp

@@ -449,13 +449,15 @@ void __cdecl music_stop()
 
 void __fastcall music_start(int nTrack)
 {
+	BOOL success;
+
 	/// ASSERT: assert((DWORD) nTrack < NUM_MUSIC);
 	music_stop();
 	if (sglpDS && gbMusicOn) {
 #ifdef _DEBUG
 		SFileEnableDirectAccess(FALSE);
 #endif
-		BOOL success = SFileOpenFile(sgszMusicTracks[nTrack], &sgpMusicTrack);
+		success = SFileOpenFile(sgszMusicTracks[nTrack], &sgpMusicTrack);
 #ifdef _DEBUG
 		SFileEnableDirectAccess(TRUE);
 #endif

Source/spells.cpp

@@ -127,12 +127,14 @@ void __fastcall UseMana(int id, int sn)
 
 BOOL __fastcall CheckSpell(int id, int sn, BYTE st, BOOL manaonly)
 {
+	BOOL result;
+
 #ifdef _DEBUG
 	if (debug_mode_key_inverted_v)
 		return TRUE;
 #endif
 
-	BOOL result = TRUE;
+	result = TRUE;
 	if (!manaonly && pcurs != 1) {
 		result = FALSE;
 	} else {

docs/TODO.md

@@ -1,20 +1,9 @@
-### Comments
-- `BUGFIX` known bugs in original (vanilla) code
-- `/* */` block comments are things to be fixed/checked
-- `FIX_ME` bad data
-
-### Known Bugs
-Serious bugs (crash/fault)
-- TBA
-
-Minor bugs (noticeable but can be avoided)
-- Server commands are broken and have been disabled `msgcmd.cpp`
-
-Code issues (incorrect code that still works)
-- Critical sections should be constructors using `CCritSect`
-- Some code uses macros such as `__ROL4__`
-- Some functions/structures have incorrect signing (signed/unsigned BYTE)
-- Function `GetLevelMTypes`, decompile and check `monster.cpp`
-- Function `SetAutomapView`, decompile and check `automap.cpp`
-- Function `engine_draw_automap_pixels`, decompile and check `engine.cpp`
-- Double check `LOBYTE` of function `random(int, int)`
+### Comments
+- `BUGFIX` known bugs in original (vanilla) code
+- `/* */` block comments are things to be fixed/checked
+- `FIX_ME` bad data
+
+Code issues (incorrect code that still works)
+- Critical sections should be constructors using `CCritSect`
+- Some code uses macros such as `__ROL2__`
+- Some functions/structures have incorrect signing (signed/unsigned BYTE)