[calls] notifier: Fix logic error

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 094d402d9b753f4e04e81317f86327efd6c2396f
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Fri Feb 25 14:25:59 2022 +0100

    notifier: Fix logic error
    
    After introducing the STR_IS_NULL_OR_EMPTY macro the rewrite of the logic was
    inverted.
    
    Fixes d3677ad5d10236731e61999cb6083f7911b30708

 src/calls-notifier.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/calls-notifier.c b/src/calls-notifier.c
index 67510bac..386f5386 100644
--- a/src/calls-notifier.c
+++ b/src/calls-notifier.c
@@ -68,8 +68,8 @@ notify (CallsNotifier *self, CuiCall *call)
   name = cui_call_get_display_name (call);
   id = cui_call_get_id (call);
 
-  got_id = STR_IS_NULL_OR_EMPTY (id);
-  got_contact = STR_IS_NULL_OR_EMPTY (name);
+  got_id = !STR_IS_NULL_OR_EMPTY (id);
+  got_contact = !STR_IS_NULL_OR_EMPTY (name);
 
   if (got_contact)
     /* %s is a name here */