fix "embedded null character" exception while reading checksum (#1037)

resources/site-packages/elementum/daemon.py

@@ -66,7 +66,8 @@ def get_elementumd_checksum(path):
         with open(path) as fp:
             fp.seek(0, os.SEEK_END)
             fp.seek(fp.tell() - 40, os.SEEK_SET)
-            return fp.read().strip()
+            checksum = fp.read().strip()
+            return checksum
     except Exception as e:
         log.info("exception reading checksum path %s: %s" % (path, e))
         return ""