Fix #287

ios/Permissions/RNPMediaLibrary.m

 
 + (NSString *)getStatus
 {
-    int status = [MPMediaLibrary authorizationStatus];
-    switch (status) {
+    switch ([MPMediaLibrary authorizationStatus]) {
         case MPMediaLibraryAuthorizationStatusAuthorized:
             return RNPStatusAuthorized;
         case MPMediaLibraryAuthorizationStatusDenied:
             completionHandler([self.class getStatus]);
         });
     };
-    
+
     [MPMediaLibrary requestAuthorization:^(MPMediaLibraryAuthorizationStatus status){
         handler();
     }];