libmusepack: tiny optimization of the ARMv4 mpc_decoder_windowing_D implementations, using register indexed addressing to store data, saving one instruction in the loop and deleting one instruction adter the loop which isn't needed.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28488 a1c6a512-1295-4272-9138-f99709370657
1 file changed