Update scharfsandhi.py
Update scharfsandhi.py

Added initialization of the Pragrhya boolean at line 1974 which had failed to be reset.  Fixes error that failed to do sandhi to the rest of the string after encountering a pragrhya word.

funderburkjim/ScharfSandhi,funderburkjim/ScharfSandhi,funderburkjim/ScharfSandhi,funderburkjim/ScharfSandhi,funderburkjim/ScharfSandhi