Check for prompts before entering logic

   * We want to avoid evaluateMessageDisplayQueue being call if no prompts are available

Author: Jeasmine

iOS_SDK/OneSignalSDK/Source/OSMessagingController.m

@@ -539,7 +539,8 @@ - (void)messageViewDidSelectAction:(OSInAppMessage *)message withAction:(OSInApp
     if (action.clickUrl)
         [self handleMessageActionWithURL:action];
 
-    [self handlePromptActions:action.promptActions];
+    if (action.promptActions && action.promptActions.count > 0)
+        [self handlePromptActions:action.promptActions];
 
     if (self.actionClickBlock)
         self.actionClickBlock(action);