Bug 1155652 - Fix two incorrect assertions r=janv

--HG--
extra : rebase_source : 3840224651890682a89142d5e9167caa60faaf6c

dom/indexedDB/ActorsParent.cpp

@@ -5492,7 +5492,7 @@ private:
   ~WaitForTransactionsHelper()
   {
     MOZ_ASSERT(!mCallback);
-    MOZ_ASSERT(mState = State_Complete);
+    MOZ_ASSERT(mState == State_Complete);
   }
 
   void
@@ -7877,7 +7877,7 @@ private:
   {
     MOZ_ASSERT(!mQuotaClient);
     MOZ_ASSERT(!mCallback);
-    MOZ_ASSERT(mState = State_Complete);
+    MOZ_ASSERT(mState == State_Complete);
   }
 
   void