Summary:
This PR fixes the issue of height/width being nil in line no 128 of RCTImagePickerManager.m .
` [self _dismissPicker:picker args:tempImageTag ? @[tempImageTag, height, width] : nil];
`
Fixes#20411
Test Plan
----------
To verify the fix , please make the changes to make either height, width or both `nil `
in `- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary<NSString *, id> *)info` function of RCTImagePickerManager.m , run the code , you will see the error saying , one of the argument is nil from the array .
![crashscenario](https://user-images.githubusercontent.com/763696/43397014-133ae8fc-9421-11e8-9730-c5906cb8dbea.png)
![crashhandledscenario](https://user-images.githubusercontent.com/763696/43397012-130e42f2-9421-11e8-80fc-cb1abaf8197c.png)
Now run the code with the fix , it will not crash .
Release Notes:
--------------
[IOS][BUGFIX][RCTImagePickerManager] - Change in RCTImagePickerManager to handle crashes if height/width is nil .
Pull Request resolved: https://github.com/facebook/react-native/pull/20454
Differential Revision: D9061059
Pulled By: hramos
fbshipit-source-id: b17f58e411f97f9b904cca0de6c151312c732972