Fixes problem with compilation in wasm-compiler.cc

Bug: 
Change-Id: I2c38a4235b53467715d2199462d995b012e63bf9
Reviewed-on: https://chromium-review.googlesource.com/819270Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
Cr-Commit-Position: refs/heads/master@{#49993}