dlmalloc compiles errors with clang

dlmalloc compiles errors with clang

of the form:
/home/nranns/Src/vpp/build-data/../src/vppinfra/dlmalloc.c:4327:7: error: logical not is only applied to the left hand side of this comparison [-Werror,-Wlogical-not-parentheses]
  if (!(ms)->magic == mparams.magic) {
/home/nranns/Src/vpp/build-data/../src/vppinfra/dlmalloc.c:4696:20: error: equality comparison with extraneous parentheses [-Werror,-Wparentheses-equality]
  if (((ms)->magic == mparams.magic)) {

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.2 LTS
Release:        16.04
Codename:       xenial

$ clang --version
clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

Change-Id: If6d70a87420bd54c8e1b8be1d9e9031f6c699c45
Signed-off-by: Neale Ranns <nranns@cisco.com>