fix forgotten include causing a compiler warning in testsys.c.
fix forgotten include causing a compiler warning in testsys.c.

yavor-atanasov/hawkey,mizdebsk/hawkey,mizdebsk/hawkey,yavor-atanasov/hawkey,rholy/hawkey,ignatenkobrain/hawkey,Conan-Kudo/hawkey,mluscon/hawkey,rholy/hawkey,ignatenkobrain/hawkey,megaumi/hawkey,megaumi/hawkey,jsilhan/hawkey,ignatenkobrain/hawkey,mizdebsk/hawkey,Conan-Kudo/hawkey,MichaelMraka/hawkey,MichaelMraka/hawkey,mluscon/hawkey,cgwalters/hawkey,jsilhan/hawkey,mluscon/hawkey,Conan-Kudo/hawkey,rpm-software-management/hawkey,ignatenkobrain/hawkey,cgwalters/hawkey,rpm-software-management/hawkey,rpm-software-management/hawkey,megaumi/hawkey,rpm-software-management/hawkey,rholy/hawkey,mizdebsk/hawkey,yavor-atanasov/hawkey,Conan-Kudo/hawkey,jsilhan/hawkey,cgwalters/hawkey,cgwalters/hawkey,MichaelMraka/hawkey,mluscon/hawkey,jsilhan/hawkey,MichaelMraka/hawkey,yavor-atanasov/hawkey,rholy/hawkey,megaumi/hawkey