[PATCH RESEND] scripts/analyze-migration: Make it work in Python 3

[Pawel Zmarzly <pzmarzly0@gmail.com>]

Currently crashing on Python 3 with:

    $ scripts/analyze-migration.py -m -f vm.state
    TypeError: ord() expected string of length 1, but int found

Signed-off-by: Pawel Zmarzly <pzmarzly0@gmail.com>
---
 scripts/analyze-migration.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/analyze-migration.py b/scripts/analyze-migration.py
index 67631ac43e..3303c05358 100755
--- a/scripts/analyze-migration.py
+++ b/scripts/analyze-migration.py
@@ -56,7 +56,7 @@ def readvar(self, size = None):
         if size is None:
             size = self.read8()
         if size == 0:
-            return ""
+            return b""
         value = self.file.read(size)
         if len(value) != size:
             raise Exception("Unexpected end of %s at 0x%x" % (self.filename, self.file.tell()))
@@ -200,7 +200,7 @@ def read(self):
                     self.files[self.name].seek(addr, os.SEEK_SET)
                     self.files[self.name].write(data)
                 if self.dump_memory:
-                    hexdata = " ".join("{0:02x}".format(ord(c)) for c in data)
+                    hexdata = " ".join("{0:02x}".format(c) for c in data)
                     self.memory['%s (0x%016x)' % (self.name, addr)] = hexdata
 
                 flags &= ~self.RAM_SAVE_FLAG_PAGE
-- 
2.51.1