Address-of used on expressions causes an exception

Reported by @fenrock af https://atariage.com/

Compiling the following results in an exception:

word  * const SAVMSC = 0x58;
word * const SCREEN = 0x0400;

void main() {
    word *wp3 = &(*SAVMSC + 1);    
    *SCREEN = *wp3;
}

Exception:

dk.camelot64.kickc.model.InternalError: Cannot cast declared type!main::$0
	at dk.camelot64.kickc.model.iterator.ProgramExpressionBinary$ProgramExpressionBinaryAssignmentLValue.addLeftCast(ProgramExpressionBinary.java:279)
	at dk.camelot64.kickc.passes.PassNAddNumberTypeConversions.lambda$step$0(PassNAddNumberTypeConversions.java:36)