parser/yaboot: Fix check for image presence

In the cleanup of yaboot option state, 3fb8fb6fb, we change from
checking opt->boot_image to opt, to indicate that we're parsing an image
section.

We missed one check, which is causing a segfault due to the null opt.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/test/parser/test-yaboot-root-global.c b/test/parser/test-yaboot-root-global.c
new file mode 100644
index 0000000..6d8da85
--- /dev/null
+++ b/test/parser/test-yaboot-root-global.c
@@ -0,0 +1,31 @@
+
+
+#include "parser-test.h"
+
+#if 0 /* PARSER_EMBEDDED_CONFIG */
+default=linux
+root=/dev/sda1
+
+image=/vmlinux
+	label=linux
+	initrd=/initrd
+#endif
+
+void run_test(struct parser_test *test)
+{
+	struct discover_boot_option *opt;
+	struct discover_context *ctx;
+
+	test_read_conf_embedded(test);
+	test_run_parser(test, "yaboot");
+
+	ctx = test->ctx;
+
+	check_boot_option_count(ctx, 1);
+
+	opt = get_boot_option(ctx, 0);
+
+	check_name(opt, "linux");
+	check_resolved_local_resource(opt->boot_image, ctx->device, "/vmlinux");
+	check_resolved_local_resource(opt->initrd, ctx->device, "/initrd");
+}