loop
        set g=buildings[i]
        loop
            set gu=FirstOfGroup(g)
            exitwhen gu==null or gu==u
            call GroupRemoveUnit(g,gu)
            set gu=null
        endloop
        exitwhen gu==u or i>33
        set i=i+1
    endloop

// . . .    
    local unit u = GetDyingUnit()
    local group g = CreateGroup()
    local unit gu=null
    local integer i=0
    loop
        set g=buildings[i]
        loop
            set gu=FirstOfGroup(g)
            exitwhen gu==null or gu==u
            call GroupRemoveUnit(g,gu)
            set gu=null
        endloop
        exitwhen gu==u or i>33
        set i=i+1
    endloop

constant native IsUnitInGroup takes unit whichUnit, group whichGroup returns boolean

function func takes nothing returns nothing
  local unit u = GetDyingUnit()
  local integer i = 0
  loop
    exitwhen i > 33 or IsUnitInGroup(u, buildings[i])
    set i = i + 1
  endloop
  set u = null
endfunction