The less-than operator was implemented a while ago but these two cases
were missed.
if(const char *force_ver_ptr = getenv("MSPGL_FORCE_VERSION"))
{
Version force_ver(force_ver_ptr);
if(const char *force_ver_ptr = getenv("MSPGL_FORCE_VERSION"))
{
Version force_ver(force_ver_ptr);
if(const char *force_ver_ptr = getenv("MSPGL_FORCE_GLSL_VERSION"))
{
Version force_ver(force_ver_ptr);
if(const char *force_ver_ptr = getenv("MSPGL_FORCE_GLSL_VERSION"))
{
Version force_ver(force_ver_ptr);