Coverity reports a forward null dereference from a for loop
that works with a variable previously tested for null that had no error
handling or condition to prevent it. Pretty obvious fix below.
Coverity issue: 139593
Fixes: 98b0fdb0ffc6 ("pmdinfogen: add buildtools and pmdinfogen utility")
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>