Obsolete bool value in IMEManager::Update_Candidate_List

[xezon]

void IMEManager::Update_Candidate_List(int candidate_flags)
{
...
                    if (list != nullptr) {
                        memset(list, 0, size);
                        bool b2 = true;
                        DWORD size2;

                        if (is_unicode) {
                            size2 = ImmGetCandidateListW(m_context, index, list, size);
                        } else {
                            size2 = ImmGetCandidateListA(m_context, index, list, size);
                        }

                        if (size2 == 0 || size2 > size) {
                            captainslog_dbgassert(size2 < size, "IME candidate buffer overrun");
                            b2 = false;
                        }

                        if (b2 && list->dwStyle && list->dwStyle != IME_CAND_CODE) {
                            if (list->dwPageStart > list->dwSelection
                                || list->dwSelection >= list->dwPageSize + list->dwPageStart) {
                                list->dwPageStart = list->dwPageSize * (list->dwSelection / list->dwPageSize);
                            }
...

b2 can be removed by using else if, making code simpler.