Fixes RLE bug in 1.7.0
1.7.0 Release notes:
This is the first "full-featured" release of bmplib.
All "normal" BMP variants supported (BI_RGB, BI_BITFIELDS, BI_ALPHABITFIELDS)
Includes support for both reading and writing RLE4, RLE8, RLE24 and 1-D Huffman compressions
Full support for 64-bit BMPs