fixup startsWith vs == in string comparisons

probably left-over from OUString transition

Change-Id: I29f8f34ad44828608aa16b0b0a0759e887e280af

connectivity/source/drivers/postgresql/pq_databasemetadata.cxx

@@ -1218,11 +1218,11 @@ struct SortInternalSchemasLastAndPublicFirst
         a[0] >>= valueA;
         b[0] >>= valueB;
         bool ret = false;
-        if( valueA.startsWith( "public" ) )
+        if( valueA==  "public" )
         {
             ret = true;
         }
-        else if( valueB.startsWith( "public" ) )
+        else if( valueB == "public" )
         {
             ret = false;
         }