Fixed Overflow in Integer Division of Signed Type to Unsigned Type

Fixed overflow in integer division of signed type to unsigned type. The behaviour was exactly as in C or C++ language (integer promotion rules) that may be surprising. Please note that the overflow is still possible when dividing large signed number to large unsigned number or vice-versa (but that case is less usual). The issue existed in all server versions. #6214 #6233 (alexey-milovidov)