search: use publisher name instead of DisplayName

The DisplayName can change between regions. For example, ZUN's games will use
"東方" when the system language is anything but English, where it will use
"Touhou" instead. It also isn't really reliable, with games like Touhou 14.3
and Touhou 18.5 not starting with "東方" (we had to make an exception for
Touhou 14.3, and Touhou 18.5 actually wasn't supported because of this).

The Publisher field doesn't seem to change between languages, and it will
definitely not change if one game decides to have a different name.

thcrap/src/search.cpp

@@ -291,22 +291,27 @@ static std::wstring GetValueFromKey(HKEY key, LPCWSTR subkey, LPCWSTR valueName)
 
 	do {
 		value.resize(valueSize);
+		valueSize *= sizeof(WCHAR);
 		ret = RegQueryValueExW(hSub, valueName, 0, &type, (LPBYTE)value.data(), &valueSize);
+		valueSize /= sizeof(WCHAR);
 	} while (ret == ERROR_MORE_DATA);
 	RegCloseKey(hSub);
 	if (ret != ERROR_SUCCESS || type != REG_SZ) {
 		return L"";
 	}
 
+	if (value[valueSize - 1] == '\0') {
+		valueSize--;
+	}
 	return std::wstring(value.data(), valueSize);
 }
 
 static bool FilterOnKey(HKEY key, LPCWSTR subkey)
 {
-	std::wstring displayName = GetValueFromKey(key, subkey, L"DisplayName");
+	std::wstring publisher = GetValueFromKey(key, subkey, L"Publisher");
 
-	return displayName.compare(0, wcslen(L"東方"), L"東方") == 0
-		|| displayName.compare(0, wcslen(L"弾幕アマノジャク"), L"弾幕アマノジャク") == 0;
+	return publisher == L"上海アリス幻樂団"
+		|| publisher == L"黄昏フロンティア";
 }
 
 static std::vector<wchar_t*> FindInstalledGamesDir()