fix typo in #error statement
#if !defined(HAVE_KRB5_524_CONVERT_CREDS) && defined(HAVE_KRB524_CONVERT_CREDS_KDC)
#define krb5_524_convert_creds krb524_convert_creds_kdc
#elif !defined(HAVE_KRB5_524_CONVERT_CREDS) && !defined(HAVE_KRB524_CONVERT_CREDS_KDC)
-#error "You must have one of krb5_524_convert_creds or krb5_524_convert_creds_kdc available"
+#error "You must have one of krb5_524_convert_creds or krb524_convert_creds_kdc available"
#endif
#endif /* WINDOWS */