re PR fortran/44055 (Warn (-Wconversion*) when converting single to double precision)

gcc/fortran/:
2010-05-19  Daniel Franke  <franke.daniel@gmail.com>

	PR fortran/44055
	* lang.opt (Wconversion-extra): New option.
	* gfortran.h (gfc_option_t): Add warn_conversion_extra.
	* options.c (gfc_init_options): Disable -Wconversion-extra by default.
	(set_Wall): Enable -Wconversion.
	(gfc_handle_option): Set warn_conversion_extra.
	* intrinsic.c (gfc_convert_type_warn): Ignore kind conditions
	introduced for -Wconversion if -Wconversion-extra is present.
	* invoke.texi: Add -Wconversion to -Wall; document new behaviour of
	-Wconversion; document -Wconversion-extra.

gcc/testsuite/:
2010-05-19  Daniel Franke  <franke.daniel@gmail.com>

	PR fortran/44055
	* gfortran.dg/c_sizeof_2.f90: Add -Wno-conversion to dg-options;
	Fixed scope of C_SIZEOF.
	* gfortran.dg/warn_conversion_2.f90: New.

From-SVN: r159586