MIDEAST STOCKS-Strong Q4 results set to boost Saudi Arabia

DUBAI, Jan 19 (Reuters) - Solid fourth-quarter results from Saudi Arabian blue chips may help boost the stock market there on Thursday while an overnight pull-back in oil and equity prices could constrain other Gulf markets. The largest lender by assets, National Commercial Bank , made a net profit in the three months to Dec. 31 of 2.29 billion riyals ($611 million), a 7.5 percent rise, boosted by higher income from commissions and investments. That was slightly ahead of estimates; analysts at A