added the header of io_state for the grid creator

Signed-off-by: Santiago Ospina <saospina@hugo.iwr.uni-heidelberg.de>

dune/dorie/solver/util_grid_creator.hh

@@ -2,6 +2,7 @@
 #define DUNE_DORIE_GRID_CREATOR_HH
 
 #include <dune/common/timer.hh>
+#include <dune/common/io_state.hh>
 
 #include <dune/grid/yaspgrid.hh>
 #include <dune/grid/io/file/gmshreader.hh>