re PR libfortran/89593 (warning "passing argument 3 of ‘_gfortran_caf_{get,send}_by_ref’ from incompatible pointer type" when building libgfortran)

	PR libgfortran/89593
	* caf/single.c (_gfortran_caf_sendget_by_ref): Cast &temp to
	gfc_descriptor_t * to avoid warning.

From-SVN: r269405