[patch, fortran] PR20373 - intrinsic symbols can be given the wrong type

[Daniel Franke]

Currently, code like this is not flagged as erroneous:

	integer, intrinsic :: abs

The patch is simple and should be self-explanatory. 


:ADDPATCH fortran:

gcc/fortran:
2007-06-18  Daniel Franke  <franke.daniel@gmail.com>

	PR fortran/20373
	* resolve.c (resolve_symbol): Add type checks to explicitly defined
	intrinsics.

gcc/testsuite:
2007-06-18  Daniel Franke  <franke.daniel@gmail.com>

	PR fortran/20373
	* gfortran.dg/intrinsic.f90: New test.


Regtested on i686-pc-linux-gnu, ok for trunk?

Regards
	Daniel
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