PR fortran/32035

	* trans-stmt.c (gfc_trans_character_select): Replace the
	mechanism with labels by a SWITCH_EXPR.
	* trans-decl.c (gfc_build_builtin_function_decls): Change
	return type for select_string.

	* runtime/select.c (select_string): Adjust prototype and function
	so that the return value is an integer, not a pointer.

	* gfortran.dg/select_char_1.f90: New test.

From-SVN: r126978