next try to get -m32 working

.travis.yml

@@ -19,7 +19,7 @@ before_install:
 - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
 - sudo add-apt-repository ppa:kalakris/cmake -y
 - sudo apt-get update -qq
-- sudo apt-get install -qq gcc-4.8
+- sudo apt-get install -qq gcc-4.8 gcc-multilib
 - sudo apt-get install -qq --no-install-recommends build-essential cmake python-lxml
   graphviz doxygen wget zip
 - wget http://security.ubuntu.com/ubuntu/pool/main/c/check/check_0.9.10-6ubuntu3_amd64.deb