[PATCH] fortran/66045 -- NULL() on RHS of assignment

[Steve Kargl]

Regression tested on trunk.  OK to commit?

The patch is self-explanatory.

Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/66045
	* expr.c (gfc_check_assign):  Check for assignment of NULL() instead
	of the (intended) pointer assignment.

2015-05-XX  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/66045
	* gfortran.dg/null1.f90: New test.

-- 
Steve
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