Blind fix for "error: chosen constructor is explicit in copy-initialization"

...on linux_clang_dbgutil_64 build

Change-Id: I00022749ce12df459ce22333593daa2eb6503fd7

comphelper/source/misc/backupfilehelper.cxx

@@ -1990,7 +1990,7 @@ namespace comphelper
         // but as we are now in SafeMode, use XML infos for this since the
         // extensions are not loaded from XExtensionManager
         ExtensionInfo aCurrentExtensionInfo;
-        const ExtensionInfoEntryVector aToBeEnabled = { };
+        const ExtensionInfoEntryVector aToBeEnabled{};
         ExtensionInfoEntryVector aToBeDisabled;
 
         aCurrentExtensionInfo.createUsingExtensionRegistryEntriesFromXML(maUserConfigWorkURL);