Make error reporting around _g_enum_nick_to_value() more consistent

src/matrix-event-call-answer.vala

@@ -49,9 +49,12 @@ public class Matrix.Event.CallAnswer : Matrix.Event.Call {
                     _answer_type = typ;
                 } else {
                     _answer_type = CallAnswerType.UNKNOWN;
+
+                    if (Config.DEBUG) {
                         warning("Unknown value %s for content.answer.type in a m.call.answer event",
                                 node.get_string());
                     }
+                }
             } else {
                 warning("content.answer.type is missing from a m.call.answer event");
             }

src/matrix-event-call-invite.vala

@@ -57,9 +57,12 @@ public class Matrix.Event.CallInvite : Matrix.Event.Call {
                     _offer_type = typ;
                 } else {
                     _offer_type = CallOfferType.UNKNOWN;
+
+                    if (Config.DEBUG) {
                         warning("Unknown value %s in content.offer.type of a m.call.invite event",
                                 node.get_string());
                     }
+                }
             } else {
                 warning("content.offer.type is missing from a m.call.invite event");
             }

src/matrix-event-room-guest-access.vala

@@ -56,9 +56,11 @@ public class Matrix.Event.RoomGuestAccess : Matrix.Event.State {
             } else {
                 _guest_access = GuestAccess.UNKNOWN;
 
+                if (Config.DEBUG) {
                     warning("Unknown value '%s' in a m.room.guest_access event",
                             node.get_string());
                 }
+            }
         } else {
             warning("content.guest_access is missing from a m.room.guest_access event");
         }

src/matrix-event-room-history-visibility.vala

@@ -55,6 +55,10 @@ public class Matrix.Event.RoomHistoryVisibility : Matrix.Event.State {
                 _visibility = vis;
             } else {
                 _visibility = Matrix.HistoryVisibility.UNKNOWN;
+
+                if (Config.DEBUG) {
+                    warning("Unknown history_visibility value %s", node.get_string());
+                }
             }
         }
 

src/matrix-event-room-join-rules.vala

@@ -51,9 +51,11 @@ public class Matrix.Event.RoomJoinRules : Matrix.Event.State {
             } else {
                 _join_rules = Matrix.JoinRules.UNKNOWN;
 
+                if (Config.DEBUG) {
                     warning("Unknown value %s in a m.room.join_rules event",
                             node.get_string());
                 }
+            }
         } else {
             _join_rules = Matrix.JoinRules.UNKNOWN;