highbd_quantize_fp_32x32: normalize abs_qcoeff type
highbd_quantize_fp_32x32: normalize abs_qcoeff type

use an int to quiet an unsigned rollover warning similar to:
25110f283 Fix an ubsan warning: vp9_quantizer.c

Change-Id: Iedecb79a17249bc18f10c0920f88cf704920f12b

webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx