Allow pMR to be built by clang
Allow pMR to be built by clang

It is currently necessary to set -Wno-braced-scalar-init for clang
(tested with Clang 4.0.0 SVN). Otherwise braced lists to avoid narrowing
conversion are reported as braced scalar initialization errors.

pjgeorg/pMR,pjgeorg/pMR,pjgeorg/pMR