Fix an uninitialized variable access in callers of parse_msdfs_symlink

At least form_junctions() does not initialize refcount, and I don't see it in
get_referred_path(). For the latters, the callers might initialize it. But even
if they did, I think parse_msdfs_symlink() should unconditionally return the
number of referrals it found. I don't think it makes sense to count them up
from somewhere else.
(This used to be commit 7317211348)

source3/smbd/msdfs.c

@@ -370,9 +370,10 @@ static bool parse_msdfs_symlink(TALLOC_CTX *ctx,
 		reflist[i].ttl = REFERRAL_TTL;
 		DEBUG(10, ("parse_msdfs_symlink: Created alt path: %s\n",
 					reflist[i].alternate_path));
-		*refcount += 1;
 	}
 
+	*refcount = count;
+
 	TALLOC_FREE(alt_path);
 	return True;
 }