graphics_library.h should not be included in computed_field.h and the prototype for Computed_field_set_transformation_matrix is not being used anyway?  The inclusion broke the winapi build.
graphics_library.h should not be included in computed_field.h and the prototype for Computed_field_set_transformation_matrix is not being used anyway?  The inclusion broke the winapi build.

cmiss/cmgui,cmiss/cmgui