Fixed: attempt to insert nil object from objects[0]

[ardavank]

Fixed the issue that was causing a crash in my application:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[0]'
*** First throw call stack:
(
	0   CoreFoundation                      0x000000011310e12b __exceptionPreprocess + 171
	1   libobjc.A.dylib                     0x00000001127a6f41 objc_exception_throw + 48
	2   CoreFoundation                      0x000000011314e0cc _CFThrowFormattedException + 194
	3   CoreFoundation                      0x0000000113022951 -[__NSPlaceholderDictionary initWithObjects:forKeys:count:] + 321
	4   CoreFoundation                      0x00000001130227db +[NSDictionary dictionaryWithObjects:forKeys:count:] + 59
	5   Mesghal                             0x000000010ace08c2 sendDynamicLink + 226
	6   Mesghal                             0x000000010ace0d0f __71+[RNFirebaseLinks application:continueUserActivity:restorationHandler:]_block_invoke + 447
	7   libdispatch.dylib                   0x0000000113fcd2f7 _dispatch_call_block_and_release + 12
	8   libdispatch.dylib                   0x0000000113fce33d _dispatch_client_callout + 8
	9   libdispatch.dylib                   0x0000000113fd95f9 _dispatch_main_queue_callback_4CF + 628
	10  CoreFoundation                      0x00000001130d0e39 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
	11  CoreFoundation                      0x0000000113095462 __CFRunLoopRun + 2402
	12  CoreFoundation                      0x0000000113094889 CFRunLoopRunSpecific + 409
	13  GraphicsServices                    0x00000001154d29c6 GSEventRunModal + 62
	14  UIKit                               0x000000010f60b5d6 UIApplicationMain + 159
	15  Mesghal                             0x000000010a6b688f main + 111
	16  libdyld.dylib                       0x000000011404ad81 start + 1
)

[Salakar]

Thanks for this, LGTM.