-Werror,-Wuninitialized

(in PropertyComposer ctor: base class 'comphelper::OBaseMutex' is
uninitialized when used here to access 'comphelper::OBaseMutex::m_aMutex')

Change-Id: I41ede9ab34e89c8dde23ce2e4fd6393b05c979c6

extensions/source/propctrlr/propertycomposer.hxx

@@ -50,8 +50,8 @@ namespace pcr
     /** implements an <type>XPropertyHandler</type> which composes it's information
         from a set of other property handlers
     */
-    class PropertyComposer  :public PropertyComposer_Base
-                            ,public ::comphelper::OBaseMutex
+    class PropertyComposer  :public ::comphelper::OBaseMutex
+                            ,public PropertyComposer_Base
                             ,public IPropertyExistenceCheck
     {
     public: