config: Declare local config variables earlier.

config: Declare local config variables earlier.

In gsu_check_options() we declare the six option variables (name,
option_type, ...)  local to avoid overwriting the content of
user-defined variables of the same name.

Of course this only works if the variables are declared local before
we assign to them. This is currently not the case because the

	eval "${gsu_options[$i]}"

statement in the first loop sets these variables before they are
declared in the body of the second loop.

This bug is benign since gsu_check_options() is usually called before
any command handler is executed. Let's fix it anyway.