Compilation error for MTTKRP with dense matrices and DCSR output 

On the master branch (as well as the web interface), for the MTTKRP example, the following data formats lead to compilation error:

```
A: DCSR
B:CSF
D:Dense Array
C:Dense Array
```

The compilation error is as follows:

```
error: use of undeclared identifier 'pA852_begin'
    if (pA852_begin < i208A85) {
        ^
1 error generated.
```

