- eliminated dependency of CVar code on AActor.

As a low level feature, the CVAR management should not access game structures like actors, just to retrieve a player index. The index should be calculated by the calling code instead and passed into the function.

# Conflicts:
#	src/win32/i_specialpaths.cpp

src/c_cvars.cpp

@@ -1599,7 +1599,7 @@ DEFINE_ACTION_FUNCTION(_CVar, GetCVar)
 	PARAM_PROLOGUE;
 	PARAM_NAME(name);
 	PARAM_POINTER(plyr, player_t);
-	ACTION_RETURN_POINTER(GetCVar(plyr ? plyr->mo : nullptr, name));
+	ACTION_RETURN_POINTER(GetCVar(plyr ? int(plyr - players) : -1, name));
 }
 
 FBaseCVar *FindCVarSub (const char *var_name, int namelen)
@@ -1624,7 +1624,7 @@ FBaseCVar *FindCVarSub (const char *var_name, int namelen)
 	return var;
 }
 
-FBaseCVar *GetCVar(AActor *activator, const char *cvarname)
+FBaseCVar *GetCVar(int playernum, const char *cvarname)
 {
 	FBaseCVar *cvar = FindCVar(cvarname, nullptr);
 	// Either the cvar doesn't exist, or it's for a mod that isn't loaded, so return nullptr.
@@ -1637,11 +1637,7 @@ FBaseCVar *GetCVar(AActor *activator, const char *cvarname)
 		// For userinfo cvars, redirect to GetUserCVar
 		if (cvar->GetFlags() & CVAR_USERINFO)
 		{
-			if (activator == nullptr || activator->player == nullptr)
-			{
-				return nullptr;
-			}
-			return GetUserCVar(int(activator->player - players), cvarname);
+			return GetUserCVar(playernum, cvarname);
 		}
 		return cvar;
 	}

src/c_cvars.h

@@ -90,7 +90,6 @@ enum ECVarType
 };
 
 class FConfigFile;
-class AActor;
 
 class FxCVar;
 
@@ -194,7 +193,7 @@ FBaseCVar *FindCVar (const char *var_name, FBaseCVar **prev);
 FBaseCVar *FindCVarSub (const char *var_name, int namelen);
 
 // Used for ACS and DECORATE.
-FBaseCVar *GetCVar(AActor *activator, const char *cvarname);
+FBaseCVar *GetCVar(int playernum, const char *cvarname);
 FBaseCVar *GetUserCVar(int playernum, const char *cvarname);
 
 // Create a new cvar with the specified name and type

src/g_statusbar/sbarinfo_commands.cpp

@@ -1484,7 +1484,7 @@ class CommandDrawNumber : public CommandDrawString
 					break;
 				case INTCVAR:
 				{
-					FBaseCVar *CVar = GetCVar(statusBar->CPlayer->mo, cvarName);
+					FBaseCVar *CVar = GetCVar(int(statusBar->CPlayer - players), cvarName);
 					if (CVar != nullptr)
 					{
 						ECVarType cvartype = CVar->GetRealType();
@@ -3534,7 +3534,7 @@ class CommandIfCVarInt : public SBarInfoNegatableFlowControl
 			SBarInfoNegatableFlowControl::Tick(block, statusBar, hudChanged);
 
 			bool result = false;
-			cvar = GetCVar(statusBar->CPlayer->mo, cvarname);
+			cvar = GetCVar(int(statusBar->CPlayer - players), cvarname);
 
 			if (cvar != nullptr)
 			{

src/p_acs.cpp

@@ -5788,7 +5788,7 @@ int DLevelScript::CallFunction(int argCount, int funcIndex, int32_t *args)
 		case ACSF_GetCVarString:
 			if (argCount == 1)
 			{
-				return DoGetCVar(GetCVar(activator, Level->Behaviors.LookupString(args[0])), true);
+				return DoGetCVar(GetCVar(activator && activator->player ? int(activator->player - players) : -1, Level->Behaviors.LookupString(args[0])), true);
 			}
 			break;
 
@@ -9733,7 +9733,8 @@ scriptwait:
 			break;
 
 		case PCD_GETCVAR:
-			STACK(1) = DoGetCVar(GetCVar(activator, Level->Behaviors.LookupString(STACK(1))), false);
+			// This should not use Level->PlayerNum!
+			STACK(1) = DoGetCVar(GetCVar(activator && activator->player? int(activator->player - players) : -1, Level->Behaviors.LookupString(STACK(1))), false);
 			break;
 
 		case PCD_SETHUDSIZE:

src/p_actionfunctions.cpp

@@ -383,7 +383,7 @@ DEFINE_ACTION_FUNCTION(AActor, GetCVar)
 		PARAM_SELF_PROLOGUE(AActor);
 		PARAM_STRING(cvarname);
 
-		FBaseCVar *cvar = GetCVar(self, cvarname);
+		FBaseCVar *cvar = GetCVar(self->player ? int(self->player - players) : -1, cvarname);
 		if (cvar == nullptr)
 		{
 			ret->SetFloat(0);
@@ -413,7 +413,7 @@ DEFINE_ACTION_FUNCTION(AActor, GetCVarString)
 		PARAM_SELF_PROLOGUE(AActor);
 		PARAM_STRING(cvarname);
 
-		FBaseCVar *cvar = GetCVar(self, cvarname);
+		FBaseCVar *cvar = GetCVar(self->player? int(self->player - players) : -1, cvarname);
 		if (cvar == nullptr)
 		{
 			ret->SetString("");

src/win32/i_specialpaths.cpp

@@ -101,10 +101,6 @@ bool UseKnownFolders()
 
 bool GetKnownFolder(int shell_folder, REFKNOWNFOLDERID known_folder, bool create, FString &path)
 {
-	using OptWin32::SHGetKnownFolderPath;
-
-	WCHAR pathstr[MAX_PATH];
-
 	// SHGetKnownFolderPath knows about more folders than SHGetFolderPath, but is
 	// new to Vista, hence the reason we support both.
 	if (!SHGetKnownFolderPath)