Fix modernize-use-default-member-init in field module

src/field/iterators/FieldIterator.impl.h

@@ -459,9 +459,9 @@ template <typename T, uint_t fs>
 inline Cell FieldIterator<T,fs>::cell() const
 {
    fastestCoord_ = cell_idx_c( linePtr_ - lineBegin_ );
-   return Cell ( xBegin_ + *curX_,
+   return { xBegin_ + *curX_,
                  yBegin_ + *curY_,
-                 zBegin_ + *curZ_ );
+                 zBegin_ + *curZ_ };
 }
 
 

src/field/iterators/FieldNeighborPointer.h

@@ -92,7 +92,7 @@ namespace field {
       inline cell_idx_t & f()       { return f_; }
       inline cell_idx_t   f() const { return f_; }
 
-      inline Cell cell() const { return Cell( x_, y_, z_ ); }
+      inline Cell cell() const { return { x_, y_, z_ }; }
 
       const FieldMember * getField() const { return &field_; }
 

src/field/iterators/FieldPointer.h

@@ -114,7 +114,7 @@ namespace field {
       inline cell_idx_t & f()       { return f_; }
       inline cell_idx_t   f() const { return f_; }
 
-      inline Cell cell() const { return Cell( x_, y_, z_ ); }
+      inline Cell cell() const { return { x_, y_, z_ }; }
 
       const FieldMember * getField() const { return &field_; }