修复在外界预览时取消选中返回后再次预览出现的数组越界问题

TZImagePickerController.podspec

 Pod::Spec.new do |s|
   s.name         = "TZImagePickerController"
-  s.version      = "1.4.0"
+  s.version      = "1.4.2"
   s.summary      = "A clone of UIImagePickerController, support picking multiple photos、original photo and video"
   s.homepage     = "https://github.com/banchichen/TZImagePickerController"
   s.license      = "MIT"
   s.author       = { "banchichen" => "736420282@qq.com" }
   s.platform     = :ios
   s.ios.deployment_target = "6.0"
-  s.source       = { :git => "https://github.com/banchichen/TZImagePickerController.git", :tag => "1.4.0" }
+  s.source       = { :git => "https://github.com/banchichen/TZImagePickerController.git", :tag => "1.4.2" }
   s.requires_arc = true
   s.resources    = "TZImagePickerController/TZImagePickerController/*.{png,xib,nib,bundle}"
   s.source_files = "TZImagePickerController/TZImagePickerController/*.{h,m}"

TZImagePickerController/TZImagePickerController/TZImagePickerController.m

@@ -113,7 +113,7 @@
     TZPhotoPreviewController *previewVc = [[TZPhotoPreviewController alloc] init];
     self = [super initWithRootViewController:previewVc];
     if (self) {
-        self.selectedAssets = selectedAssets;
+        self.selectedAssets = [NSMutableArray arrayWithArray:selectedAssets];
         self.allowPickingOriginalPhoto = YES;
         self.timeout = 15;
         self.photoWidth = 828.0;