The sym_calc_value() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Michal Marek <mmarek@suse.com> Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>