adds missing include to toy_scrip

examples/interpolation_benchmark/toy_scrip.c

@@ -11,6 +11,7 @@
 #include <math.h>
 #include <netcdf.h>
 #include <string.h>
+#include <stdbool.h>
 #include "yac_interface.h"
 #include "vtk_output.h"
 #include "read_scrip_grid.h"