Implement GetRevision() for wii disks.

Source/Core/DiscIO/VolumeGC.cpp

@@ -92,11 +92,11 @@ int CVolumeGC::GetRevision() const
 	if (!m_pReader)
 		return 0;
 
-	u8 Revision;
-	if (!Read(7, 1, &Revision))
+	u8 revision;
+	if (!Read(7, 1, &revision))
 		return 0;
 
-	return Revision;
+	return revision;
 }
 
 std::vector<std::string> CVolumeGC::GetNames() const

Source/Core/DiscIO/VolumeWiiCrypted.cpp

@@ -154,6 +154,18 @@ std::string CVolumeWiiCrypted::GetMakerID() const
 	return makerID;
 }
 
+int CVolumeWiiCrypted::GetRevision() const
+{
+	if (!m_pReader)
+		return 0;
+
+	u8 revision;
+	if (!Read(7, 1, &revision))
+		return 0;
+
+	return revision;
+}
+
 std::vector<std::string> CVolumeWiiCrypted::GetNames() const
 {
 	std::vector<std::string> names;

Source/Core/DiscIO/VolumeWiiCrypted.h

@@ -36,6 +36,7 @@ public:
 	ECountry GetCountry() const override;
 	u64 GetSize() const override;
 	u64 GetRawSize() const override;
+	int GetRevision() const override;
 
 	bool SupportsIntegrityCheck() const override { return true; }
 	bool CheckIntegrity() const override;