Mal:Centurybox/centh

This template corrects any century number less than one then passes parameters on to {{Centurybox/nthcent}} which, in turn converts {{{1}}} to Abad ka-{{{1}}} (SM) (SM is included if {{{2}}}=SM) allowing for alternatives to abad & SM (respective defaults of {{{cm}}} & {{{sm}}}).