QuickJS: fix infinite loop on inflate of a stream needing a dictionary

QuickJS: fix infinite loop on inflate of a stream needing a dictionary

The qjs inflate loop treated only rc < 0 as an error.  Z_NEED_DICT is
positive, so a zlib stream with the FDICT flag and no dictionary made
inflate() return Z_NEED_DICT with no progress every iteration, spinning
forever and growing the output chain on attacker-controlled input.

Handle Z_NEED_DICT explicitly, matching the njs zlib module.