[fortran, patch] reduce noise of -Wconversion

[Daniel Franke]

Hi all.

attached patch attempts to reduce amount of noise generated by -Wconversion.


gcc/fortran/:
2010-05-08  Daniel Franke  <franke.daniel@gmail.com>

	PR fortran/27866
	PR fortran/35003
	PR fortran/42809
	* intrinc.c (gfc_convert_type_warn): Be more dicriminative
	about conversion warnings.

gcc/testsuite/:
2010-05-08  Daniel Franke  <franke.daniel@gmail.com>

	PR fortran/27866
	PR fortran/35003
	PR fortran/42809
	* gfortran.dg/array_constructor_type_17.f03: Updated match string.
	* gfortran.dg/warn_conversion.f90: New.


Regression tested on i686-pc-linux-gnu.
Ok for trunk?

	Daniel
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