CCMC bug fix: initialise RNG.
CCMC bug fix: initialise RNG.

85f410f introduced the new dSFMT interface (where the dSFMT state is no
longer a global variable) but forgot to initialise the RNG in the CCMC
code.  It does look to be initialised everywhere else though!

hande-qmc/hande,ruthfranklin/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande