Avoid crash - reply only works from ConversationVC

// FREEBIE

Signal/src/ViewControllers/ConversationView/ConversationViewItem.h

@@ -118,6 +118,8 @@ NSString *NSStringForOWSMessageCellType(OWSMessageCellType cellType);
 - (void)shareTextAction;
 - (void)saveMediaAction;
 - (void)deleteAction;
+
+- (SEL)replyActionSelector;
 - (SEL)metadataActionSelector;
 
 @end

Signal/src/ViewControllers/MediaDetailViewController.m

@@ -432,6 +432,14 @@ NS_ASSUME_NONNULL_BEGIN
     if (action == self.viewItem.metadataActionSelector) {
         return NO;
     }
+
+    // Reply is not supported from MediaDetailView.
+    // TODO implement a "scroll to message" action which would
+    // let users scroll back to the media message in their message history.
+    if (action == self.viewItem.replyActionSelector) {
+        return NO;
+    }
+
     return [self.viewItem canPerformAction:action];
 }