trans-expr.c (gfc_conv_function_call): Return int instead of void.

	* trans-expr.c (gfc_conv_function_call): Return int instead of
	void.  Use a local variable for has_alternate_specifier and
	return it.  Avoid modification of function type's return value
	in place, since it may be shared.
	* trans.h (has_alternate_specifier): Remove.
	(gfc_conv_function_call): Change return type.
	* trans-stmt.c (has_alternate_specifier): Remove.
	(gfc_trans_call): Add a local has_alternate_specifier variable,
	set it from gfc_conv_function_call return value.

	* gfortran.dg/altreturn_1.f90: New test.

From-SVN: r100878