Extension intarray and null values

Hello,

I use tables with several "int[]" columns.
I use the "@>" operator to filter my data.

To increase speed , i install the "intarray" extension. Now queries are
very fast with the specific indexes (i use "gin__int_ops").

But, in few columns, i have null values in my intarray and i cannot use the
"@>" operator.
Because i have the error "ERROR: array must not contain nulls".

The documentation says that the standard operator "@>" is overrided by the
intarray extension when arguments are int[].

Do you have a solution, to rename the "@>(int{], int[])" to use it only
when it is possible and to prevent the override of the current behavior ?

Or if you know, how use the default @> operator instead of the override.

Thank you,
Eric.