Merge pull request #447 from box/extension

Fix how the extension gets calculated when accounting for empty filenames

BoxContentSDK/BoxContentSDK/Categories/NSString+BOXContentSDKAdditions.m

@@ -110,15 +110,10 @@ - (NSString *)box_stringByDeletingMultiplePathExtensionsIfNecessary
 
 - (NSString *)box_fileNameExtensionAccountingForEmptyName
 {
-    // Get the path extension from the file name.
-    NSString *string = [[self lastPathComponent] pathExtension];
-
     // pathExtension returns an empty string if there are no characters before the pathExtension (e.g ".jpg" or ".m4a")
     // Just simulating a correct name to correctly find the extension, since they are still valid files that can be previewed.
-    if (string.length == 0) {
-        NSString *tmp = [NSString stringWithFormat:@"tmp%@", self.lastPathComponent];
-        string = [tmp box_pathExtensionAccountingForZippedPackages];
-    }
+    NSString *tmp = [NSString stringWithFormat:@"tmp%@", self.lastPathComponent];
+    NSString *string = [tmp box_pathExtensionAccountingForZippedPackages];
 
     return string;
 }