Simplify incomplete code table filling in inflate_table().
Simplify incomplete code table filling in inflate_table().

Due to earlier changes in the error checking in inflate_table(), the
code to fill in a table for an incomplete code handled cases that can
never actually occur.  This simplifies that code to handle the only
possible case, which is a single empty table entry for a code with
a single symbol with a length of one bit.

Streamlet/ZLibWrap,Streamlet/ZLibWrap,Streamlet/ZLibWrap,Streamlet/ZLibWrap,Streamlet/ZLibWrap