MT#60476 sdp_replace: set `keep_zero_address` in one line

Instead of setting it in two lines via temporary variable,
just negate it in one line for laconicity reasons.

Change-Id: Ie65d68ef5b8082f5de544ab2a9833a59d5e01d9a

daemon/sdp.c

@@ -3393,8 +3393,7 @@ int sdp_replace(struct sdp_chopper *chop, sdp_sessions_q *sessions,
 			}
 		}
 
-		bool media_has_ice = MEDIA_ISSET(call_media, ICE);
-		bool keep_zero_address = ! media_has_ice;
+		bool keep_zero_address = !MEDIA_ISSET(call_media, ICE);
 
 		if (session->connection.parsed && sess_conn &&
 		    flags->ice_option != ICE_FORCE_RELAY) {