Extend expression.c tests

Jan Breuer

2015-12-05 56f5bddb7e2a6267bdfeddf8de601a057aef802f

 libscpi/src/expression.c

@@ -245,6 +245,8 @@
            *dimensions = fromDimensions;
            return SCPI_EXPR_OK;
        }
    } else if (err == SCPI_EXPR_NO_MORE) {
        err = SCPI_EXPR_ERROR;
    }

    return err;