Fix regression in update method to fix #110

Locksmith.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "Locksmith"
-  s.version          = "2.0.7"
+  s.version          = "2.0.8"
   s.summary          = "Locksmith is a powerful, protocol-oriented library for working with the keychain in Swift."
   s.description      = <<-DESC
                        Locksmith is a powerful, protocol-oriented library for working with the iOS, Mac OS X, watchOS, and tvOS keychain in Swift. It provides extensive support for a lot of different keychain requests, and extensively uses Swift-native concepts.

Source/Locksmith.swift

@@ -517,11 +517,15 @@ extension CreateableSecureStorable {
         let status = SecItemUpdate(query, attributesToUpdate)
 
         if let error = LocksmithError(fromStatusCode: Int(status)) {
-            throw error
-        }
-
-        if status != errSecSuccess {
-            throw LocksmithError.Undefined
+            if error == .NotFound || error == .NotAvailable {
+                try self.createInSecureStore()
+            } else {
+                throw error
+            }
+        } else {
+            if status != errSecSuccess {
+                throw LocksmithError.Undefined
+            }
         }
     }
 }

Tests/LocksmithTests.swift

@@ -53,6 +53,12 @@ class LocksmithTests: XCTestCase {
         let loaded3 = Locksmith.loadDataForUserAccount(userAccount, inService: service)! as! TestingDictionaryType
         
         XCTAssertEqual(loaded3, updatedData)
+        
+        try! Locksmith.deleteDataForUserAccount(userAccount, inService: service)
+        
+        try! Locksmith.updateData(["some update": "data"], forUserAccount: userAccount, inService: service)
+        let updateResult = Locksmith.loadDataForUserAccount(userAccount, inService: service)! as! [String: String]
+        XCTAssertEqual(updateResult, ["some update": "data"])
     }
     
     func testStaticMethodsForDefaultService() {
@@ -94,6 +100,22 @@ class LocksmithTests: XCTestCase {
         createGenericPasswordWithData(data)
     }
     
+    func testUpdateCreatesIfNotExists() {
+        let data = ["some": "data"]
+        
+        struct CreateGenericPassword: CreateableSecureStorable, GenericPasswordSecureStorable, ReadableSecureStorable {
+            var data: [String: AnyObject]
+            let account: String
+            let service: String
+        }
+        
+        let update = CreateGenericPassword(data: data, account: userAccount, service: service)
+        try! update.updateInSecureStore()
+        
+        let read = update.readFromSecureStore()!.data as! [String: String]
+        XCTAssertEqual(read, ["some": "data"])
+    }
+    
     func testUpdateForGenericPassword() {
         let data = ["some": "data"]