Patch to gfortran/13742 (was: equivalence, common and initialization)

[Victor Leikehman]

Fortran/13742 ("Initial values for COMMON or EQUIVALENCE") combines two
defects:

    (1) Initializing variables inside COMMON block is forbidden and
        should be rejected, unless (a) COMMON block is named and (b) the
        initialization is inside BLOCK DATA programming unit.
and,

    (2) Initializing variables inside EQUIVALENCE is allowed and
        should be supported.


Now, after Tobi's fix to (1) have been integrated, I resubmit
my fix to (2).

	Victor
-- 
  Victor Leikehman
  IBM Research Labs in Haifa, Israel

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