opcodes: initialize variable before use.

This fixes build errors due to the compiler complaining that
'imm' may be used uninitialized in function 'expand_fp_imm'.

Bug: 37683243
Test: './toolchain/gcc/build.py --host=windows' works.
Change-Id: I3c6b3a97255d647b3227f67f18193e9d5186a572
1 file changed
tree: cb002e94815abc64421f358e49195efa1646d079
  1. binutils-2.27/
  2. OWNERS