Fortran: make some trans* functions static

Fortran: make some trans* functions static

This makes some trans* functions static and deletes declarations of
functions that either do not exist anymore like gfc_get_function_decl
or that are unused like gfc_check_any_c_kind.

gcc/fortran/ChangeLog:

	* expr.c (is_non_empty_structure_constructor): Make static.
	* gfortran.h (gfc_check_any_c_kind): Delete.
	* match.c (gfc_match_label): Make static.
	* match.h (gfc_match_label): Delete declaration.
	* scanner.c (file_changes_cur, file_changes_count,
	file_changes_allocated): Make static.
	* trans-expr.c (gfc_get_character_len): Make static.
	(gfc_class_len_or_zero_get): Make static.
	(VTAB_GET_FIELD_GEN): Undefine.
	(gfc_get_class_array_ref): Make static.
	(gfc_finish_interface_mapping): Make static.
	* trans-types.c (gfc_check_any_c_kind): Delete.
	(pfunc_type_node, dtype_type_node, gfc_get_ppc_type): Make static.
	* trans-types.h (gfc_get_ppc_type): Delete declaration.
	* trans.c (gfc_msg_wrong_return): Delete.
	* trans.h (gfc_class_len_or_zero_get, gfc_class_vtab_extends_get,
	gfc_vptr_extends_get, gfc_get_class_array_ref, gfc_get_character_len,
	gfc_finish_interface_mapping, gfc_msg_wrong_return,
	gfc_get_function_decl): Delete declaration.