util/romcc: Move access after NULL-check

Change-Id: I7f9c38fd6e75b32fe1ed8a60c7054f4dd1fcd5c0
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Found-by: Coverity Scan #1129104
Reviewed-on: https://review.coreboot.org/17884
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/util/romcc/romcc.c b/util/romcc/romcc.c
index 9a90167..655e6f5 100644
--- a/util/romcc/romcc.c
+++ b/util/romcc/romcc.c
@@ -6287,10 +6287,10 @@
 		internal_error(state, 0, "field_reg_offset only works on structures and unions");
 	}
 
-	size += reg_needed_padding(state, member, size);
 	if (!member || (member->field_ident != field)) {
 		error(state, 0, "member %s not present", field->name);
 	}
+	size += reg_needed_padding(state, member, size);
 	return size;
 }