re PR fortran/39996 (Double typing of function results not detected)
2009-05-14 Janus Weil <janus@gcc.gnu.org>
PR fortran/39996
* decl.c (gfc_match_function_decl): Use gfc_add_type.
* symbol.c (gfc_add_type): Better checking for duplicate types in
function declarations. And: Always give an error for duplicte types,
not just a warning with -std=gnu.