com_stats(): Work around bogus gcc warning.

com_stats(): Work around bogus gcc warning.

For some versions of gcc (7.4.0, 8.3.0, and 8.3.0-7 as shipped with
Debian-11, but not gcc-7.4.0-1ubuntu1~18.04.1), the previous patch
introduced the following warning:

	tfortune.c:912:3: warning: 'lh_stats' may be used uninitialized in this function [-Wmaybe-uninitialized]
	   free(lh_stats);
	   ^~~~~~~~~~~~~~

We only assign to lh_stats when --verbose is given, and only free the
memory if --verbose is given.  Apparently gcc has started to believe
that the value of the "verbose" boolean variable might change, which is
impossible. Therefore, the warning is believed to be a false positive.

However, gcc has a point: There is no need to check for --verbose
twice, as a single branch is sufficient. This not only gets rid of
the warning but also makes the boolean variable pointless and removes
more lines than it adds.