#297 infinite loop inside GBitmap::read_rle_raw

[Hongxu Chen]

As of git commit b9ef2a1, djvulibre has an infinit loop inside GBitmap::read_rle_raw. For example, c=0, x=0 and h=0, the condition at line 905 will never be satisfied and n will not be updated, causing the condition n >= 0 to always hold.

This may be triggered by running cjb2 h01.txt /dev/null

[Leon Bottou]

Fixed