nanddump: skip bad blocks when instructed to do so

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/miscutils/nandwrite.c b/miscutils/nandwrite.c
index a934334..554d362 100644
--- a/miscutils/nandwrite.c
+++ b/miscutils/nandwrite.c
@@ -182,7 +182,7 @@
 			mtdoffset = next_good_eraseblock(fd, &meminfo, blockstart);
 			if (IS_NANDWRITE)
 				printf("Writing at 0x%08x\n", mtdoffset);
-			else if (mtdoffset > blockstart) {
+			else if (mtdoffset > blockstart && !(opts & OPT_b)) {
 				int bad_len = MIN(mtdoffset, limit) - blockstart;
 				dump_bad(&meminfo, bad_len, !(opts & OPT_o));
 			}