coverity#1260446 Uninitialized scalar field

and

coverity#1260447 Uninitialized scalar field

Change-Id: I3aa5a1caf776fddc8b6029e96c24aa86b21de880

sc/source/core/tool/scmatrix.cxx

@@ -1908,6 +1908,7 @@ public:
 
     wrapped_iterator(typename T::const_iterator it_, U aOp):
         it(it_),
+        val(value_type()),
         maOp(aOp)
     {
     }