kadm5: kadm5_add_passwd_quality_verifier memory leak

if krb5_get_config_strings() returns the empty string do not return
immediately.  Instead the for() loop will be skipped because the empty
string represents the end of the string list permitting
krb5_config_free_strings() to free the allocated memory.

Change-Id: Ia6fdb13f716c07b53c8b3857af4f7ab8be578882

lib/kadm5/password_quality.c

@@ -378,15 +378,15 @@ kadm5_add_passwd_quality_verifier(krb5_context context,
 #ifdef HAVE_DLOPEN
 
     if(check_library == NULL) {
-	krb5_error_code ret;
+	krb5_error_code ret = 0;
         char **strs;
 	char **tmp;
 
 	strs = krb5_config_get_strings(context, NULL,
 				       "password_quality",
 				       "policy_libraries",
 				       NULL);
-	if(strs == NULL || *strs == NULL)
+	if (strs == NULL)
 	    return 0;
 
 	for (tmp = strs; *tmp; tmp++) {