[BUG] Wrong objective on trivial LP problem without constraints

**Describe the bug**
The objective value is being reported wrong

**Steps/Code to reproduce bug**

```
echo "NAME
OBJSENSE
 MAX
ROWS
 N  OBJ
COLUMNS
    x1        OBJ       1
RHS
RANGES
BOUNDS
 MI bounds    x1
 UP bounds    x1        1
ENDATA" >trivial.mps 

cuopt_cli trivial.mps
```

**Expected behavior**
The objective should be 1. But dual simplex returns -1. 