Made sure all member variables are initialized.

Initialized member variable that was missing in the member initializer
list of the constructor. This issue was reported at runtime when compiling
with gcc and option -fsanitize=undefined.

dcmiod/libsrc/modmultiframedimension.cc

@@ -1,6 +1,6 @@
 /*
  *
- *  Copyright (C) 2015-2024, Open Connections GmbH
+ *  Copyright (C) 2015-2025, Open Connections GmbH
  *  All rights reserved.  See COPYRIGHT file for details.
  *
  *  This software and supporting documentation are maintained by
@@ -46,6 +46,7 @@ IODMultiframeDimensionModule::IODMultiframeDimensionModule()
     : IODModule()
     , m_DimensionIndexSequence()
     , m_DimensionOrganizationSequence()
+    , m_CheckOnWrite(OFTrue)
 {
     resetRules();
 }