Sed dumps core when linked with some coalescing malloc because it

doesn't initialize malloced structure.

Submitted by:	vode@hut.fi

usr.bin/sed/compile.c

@@ -217,6 +217,8 @@ semicolon:	EATSPACE();
 			if (!*p)
 				p = NULL;
 			cmd2 = xmalloc(sizeof(struct s_command));
+			cmd2->nonsel = cmd2->inrange = 0;
+			cmd2->a1 = cmd2->a2 = NULL;
 			cmd2->code = '}';
 			*compile_stream("}", &cmd->u.c, p) = cmd2;
 			cmd->next = cmd2;