schemas/codexentry: Clarify that what unset status_body_name means

schemas/codexentry-README.md

@@ -64,7 +64,7 @@ release, Update 7, plus one patch).
    away.
 5. If Status.json does **not** have `BodyName` then clear `status_body_name`.
 6. For a `CodexEntry` event:
-    1. Check that `status_body_name` is set. If it is not, exit.
+    1. Only if `status_body_name` is set:
         1. Set the EDDN `codexentry` schema message `BodyName` to this value.
         2. Check if it matches the `journal_body_name` value, and 
            ONLY if they match, set `BodyID` in the EDDN `codexentry`
@@ -121,4 +121,4 @@ So you might receive any of:
 3. Both `BodyName` and `BodyID` keys present, with values.  This SHOULD 
    indicate a codex entry object which is on a body surface.
 
-Adjust your local processing accordingly.
+Adjust your local processing accordingly.