[libromdata] PlayStationDisc::extURLs(): Use a lambda function instea…

…d of ::toupper().

::toupper() might be a macro in some cases.

PlayStationDiscPrivate::parse_system_cnf(): `char`, not `unsigned char`.

src/libromdata/Console/PlayStationDisc.cpp

@@ -165,7 +165,7 @@ int PlayStationDiscPrivate::parse_system_cnf(void *user, const char *section, co
 	// Save the value for later.
 	string s_name(name);
 	std::transform(s_name.begin(), s_name.end(), s_name.begin(),
-		[](unsigned char c) noexcept -> char { return std::toupper(c); });
+		[](char c) noexcept -> char { return std::toupper(c); });
 
 	PlayStationDiscPrivate *const d = static_cast<PlayStationDiscPrivate*>(user);
 	auto ret = d->system_cnf.emplace(std::move(s_name), value);
@@ -946,7 +946,8 @@ int PlayStationDisc::extURLs(ImageType imageType, vector<ExtURL> *pExtURLs, int
 	// Boot filename format: SLUS_207.18
 	// Using the first part as the region code.
 	string gameID = d->boot_filename;
-	std::transform(gameID.begin(), gameID.end(), gameID.begin(), ::toupper);
+	std::transform(gameID.begin(), gameID.end(), gameID.begin(),
+		[](char c) noexcept -> char { return std::toupper(c); });
 	string region_code;
 	size_t pos = gameID.find('_');
 	if (pos != string::npos) {