[patch,fortran]PR25057 default initialization and DATA statement conflict

[Jerry DeLisle]

The attached patch fixes this bug by providing an appropriate error message. 
This is related to pr24978, but needs to be handled a little differently to give 
a better error message.  This is round one of probably several patches to catch 
these invalid cases.

Regression tested on x86-64-linux.  OK for trunk?

Regards,

Jerry


2006-12-10  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR fortran/25057
	* gfortran.h (gfc_assign_data_value): Return TRY instead of void.
	* data.c (gfc_assign_data_value): Add check for already initialized.
	* resolve.c (check_data_variable): If assignment fails, return FAILURE
	to avoid repeated error messages.
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