all: update for API changes (config etc.)

Use the new & improved APIs.

lib/utils/mu-error.hh

@@ -69,6 +69,8 @@ struct Error final : public std::exception {
 		UnverifiedSignature     = err_enum(119,1,0),
 		User                    = err_enum(120,1,0),
 		Xapian                  = err_enum(121,1,0),
+
+		CannotReinit           = err_enum(122,1,0),
 	};
 
 	/**

lib/utils/mu-result.hh

@@ -1,5 +1,5 @@
 /*
-** Copyright (C) 2019-2020 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+** Copyright (C) 2019-2023 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
 **
 ** This program is free software; you can redistribute it and/or modify it
 ** under the terms of the GNU General Public License as published by the
@@ -134,8 +134,6 @@ Err(Error::Code errcode, GError **err, const char* frm, ...)
 	return Err(errcode, std::move(str));
 }
 
-
-
 /**
  * Assert that some result has a value (for unit tests)
  *
@@ -150,8 +148,6 @@ Err(Error::Code errcode, GError **err, const char* frm, ...)
 	}						\
 } while(0)
 
-
-
 }// namespace Mu
 
 #endif /* MU_RESULT_HH__ */