fixed an overflow issue in unpack_k_bits::unpack
gr-audio OSX: fix call to AudioHardwareRemovePropertyListener to match API.
gr-audio OSX: fix casting of Int32 to char[] to a memcpy to make older GCC happy.
volk cmake: if the CPU is not x86, eliminate all Intel SIMD.
Merge branch 'maint'
Merge remote-tracking branch 'markcottrell/unpack_k_bits_overflow_fix'