Middle Cerebral Artery Aneurysm: Incidental Small Saccular MCA Aneurysm with Complex Geometry in a Patient with Ischemic Pontine Stroke – Microsurgical Clipping of the Saccular Aneurysm and Wrapping of a Blister Aneurysm on the Inferior MCA Branch (Postoperative DSA Confirmed the Complete Occlusion of the Saccular Aneurysm and Patency of Both Efferent MCA Branches – Development of a High-Grade Stenosis of the Inferior Trunk of the MCA, Possibly Induced by Muslin Gauze, and Eventually Formation of a De Novo Aneurysm)