Apple II original: default to 48K (ie. no Language Card) (PR #592)

Added support for #590:
* Changed Apple II original to default to no LC
* Added new cmd-line switch: -s0 <languagecard|lc>
* Changed so when LC is in slot-0, it now use Apple II+'s F8 (auto-start) ROM

source/LanguageCard.cpp

@@ -44,6 +44,11 @@ LanguageCardUnit::LanguageCardUnit(void) :
 	SetMemMainLanguageCard(NULL, true);
 }
 
+LanguageCardUnit::~LanguageCardUnit(void)
+{
+	SetMemMainLanguageCard(NULL);
+}
+
 DWORD LanguageCardUnit::SetPaging(WORD address, DWORD memmode, BOOL& modechanging, bool write)
 {
 	memmode &= ~(MF_BANK2 | MF_HIGHRAM);