how to check cursor is exists before close them

hi
i have below script in store procedure :
///////////////////////////////////////
Begin Transaction
Begin Try
Declare csXXXX Cursor For
Open csXXXX
Fetch Next From csXXXX into ......
while @@FETCH_STATUS = 0 begin
...
...
Fetch Next From csXXXX into .......
end
Close csXXXX
DeAllocate csXXXX
End Try
Begin Catch
If @@TRANCOUNT > 0 Rollback Transaction
End Catch
If @@TRANCOUNT > 0 begin
Commit Transaction
end
///////////////////////////////////////
notice that if some error raise during the while @@Fetch_status, SQL will jump
to begin catch portion and the cursor will not close. If i execute again the same
store procedure, SQL server will prompt 'Cursor csXXX already exists..
i try to put below script after the begin catch
Close csXXXX
DeAllocate csXXXX
but if the error raise before the open csXXXX, then might have another error due to cursor not exists.
how to check whether the cursor is exists or any other alternate solution ?
Please help...