Catch empty file case. From Tobias Stoeckmann.

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@17051 ec53bebd-3082-4978-b11e-865c3cabbd6b

kadmin/add-random-users.c

@@ -72,6 +72,8 @@ read_words (const char *filename, char ***ret_w)
 	w[n++] = wptr;
 	wptr += len + 1;
     }
+    if (n == 0)
+	errx(1, "%s is an empty file, no words to try", filename);
     *ret_w = w;
     return n;
 }

kuser/generate-requests.c

@@ -67,6 +67,8 @@ read_words (const char *filename, char ***ret_w)
 	w[n++] = estrdup (buf);
     }
     *ret_w = w;
+    if (n == 0)
+	errx(1, "%s is an empty file, no words to try", filename);
     return n;
 }