Make sub-pixel mv search's return value consistent with the return type
Make sub-pixel mv search's return value consistent with the return type

For out-of-range cases, returned UINT_MAX instead of INT_MAX in the
sub-pixel mv search to be consistent with the "uint32_t" return type.

Change-Id: I8e206d771228c13d89bafbbe9f14722c8ecc6a7a

mwgoldsmith/libvpx,mwgoldsmith/vpx,mwgoldsmith/libvpx,webmproject/libvpx,mwgoldsmith/vpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,mwgoldsmith/vpx,mwgoldsmith/libvpx,webmproject/libvpx,mwgoldsmith/libvpx,mwgoldsmith/libvpx,ShiftMediaProject/libvpx,mwgoldsmith/vpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,mwgoldsmith/vpx,mwgoldsmith/vpx,mwgoldsmith/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx