Partition not updated for a single (simple) triangle

**Bug:**
In the case of a single triangle as input:
0\t1
0\t2
1\t2

Ouput is three different communities.

**Root cause:**
All _oms_ values in the min heap _H_ are 0.0, thus _S_ is 1.0.
This causes the if term in line 135:
    _"if S != S_prev: "_
To always be false, so no update to _p_ is done.

**Fix:**
Change line 135 to:
    _if S != S_prev or S== 1.0:_
