spdkcli: print bdev size if it's 0 bytes

Print "0 bytes" in case reported number of
blocks is for some reason "0" instead of
returning awkward empty string.

Signed-off-by: Karol Latecki <karol.latecki@intel.com>
Change-Id: Ifd8bb0a7b389ebee8af324bfa21afbe5595632a5
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15906
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>

python/spdk/spdkcli/ui_node.py

@@ -9,6 +9,8 @@ import json
 
 
 def convert_bytes_to_human(size):
+    if size == 0:
+        return "%3.1f%s" % (size, "bytes")
     if not size:
         return ""
     for x in ["bytes", "K", "M", "G", "T"]: