dbaccess: avoid exceptions during loading embedded data sources

Situation before/after the patch is the same, just silence lots of
harmless warnings for now.

Change-Id: I00428bdfd939d8cdd3bfd447339e0417e70f4689

dbaccess/source/core/dataaccess/ModelImpl.cxx

@@ -824,6 +824,11 @@ Reference< XStorage > ODatabaseModelImpl::getOrCreateRootStorage()
             aStorageCreationArgs[1] <<= ElementModes::READWRITE;
 
             Reference< XStorage > xDocumentStorage;
+            OUString sURL;
+            aSource >>= sURL;
+            // Don't try to load a meta-URL as-is.
+            if (!sURL.startsWithIgnoreAsciiCase("vnd.sun.star.pkg:"))
+            {
                 try
                 {
                     xDocumentStorage.set( xStorageFactory->createInstanceWithArguments( aStorageCreationArgs ), UNO_QUERY_THROW );
@@ -841,6 +846,7 @@ Reference< XStorage > ODatabaseModelImpl::getOrCreateRootStorage()
                         DBG_UNHANDLED_EXCEPTION();
                     }
                 }
+            }
 
             impl_switchToStorage_throw( xDocumentStorage );
         }