fix up bmlutils some more

Change-Id: Ia11e917a6c0dc8164d599e02154f9f7b2934ed65
diff --git a/flashutils/flash_image.c b/flashutils/flash_image.c
index 560370c..3966c42 100644
--- a/flashutils/flash_image.c
+++ b/flashutils/flash_image.c
@@ -147,5 +147,8 @@
         return 2;
     }
 
-    return restore_raw_partition(argv[1], argv[2]);
+    int ret = restore_raw_partition(argv[1], argv[2]);
+    if (ret != 0)
+        fprintf(stderr, "failed with error: %d\n", ret);
+    return ret;
 }