Minor tweaks.

Use dexOpCodeFromCodeUnit instead of (*insns & 0xff).  (Not strictly
necessary in its current incarnation, but the code will soon be checking
opcode flags.)

Mark some local functions "static".

Make instruction widths >= 65536 a warning rather than an error.  I
don't think you can get there with converted Java bytecode because of
the method size limit, but it's possible in directly-generated DEX.

Change-Id: Ic9714b855c606f8b5c618793b271436e1c2cdc44
3 files changed