qemuboot: Fix build error if UNINATIVE_LOADER is unset
I got this error on current master:
File: 'exec_func_python() autogenerated', lineno: 2, function: <module>
0001:
*** 0002:do_write_qemuboot_conf(d)
0003:
File: '.../layers/openembedded-core/meta/classes/qemuboot.bbclass', lineno: 141, function: do_write_qemuboot_conf
0137: else:
0138: val = d.getVar(k)
0139: # we only want to write out relative paths so that we can relocate images
0140: # and still run them
*** 0141: if val.startswith(topdir):
0142: val = os.path.relpath(val, finalpath)
0143: cf.set('config_bsp', k, '%s' % val)
0144:
0145: # QB_DEFAULT_KERNEL's value of KERNEL_IMAGETYPE is the name of a symlink
Exception: AttributeError: 'NoneType' object has no attribute 'startswith'
Do nothing if "val" is None, which may happen for k = "UNINATIVE_LOADER".
Signed-off-by: Zoltán Böszörményi <zboszor@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
