*** dfa.c.old	Tue May  5 19:32:11 1992
--- dfa.c	Tue Sep  8 18:40:13 1992
***************
*** 1932,1937 ****
--- 1932,1938 ----
  			if (--i == j)
  				break;
  			cpp[j] = cpp[i];
+ 			cpp[i] = 0;
  		}
  	/*
  	** Add the new string.