Update hive_winter.m

Current error I'm trying to work out is
Error using  * 
Inner matrix dimensions must agree.

Error in hive_winter (line 57)
        wintpop = W*Y(5:end)'; %this is a 4xmaxagewinter matrix %this pieces causes second season
        crash- not just bad pic

Error in simulator (line 123)
    winterresults = hive_winter(T,agemax,agemaxwinter,summerdays,yeardays,res,V,P,H,R);