Uneven number Binary to Hex Conversion

[Shayaan-Kashif]

When converting from Binary to Hex if the input binary number is uneven the code may not work as intended. For example given the input of 10 0110 0101 the result should be 265. However the code computes it as 4C. On the contrary a binary input of 010 should result in 2 and the code works given that input.

[Willev05]

Line 149 is missing the % 4 operator leading to it checking if the length itself == 2. Fixed, tested and works.