[patch, fortran, committed] Walk expressions in subroutine calls

[Thomas Koenig]

Hello world,

I have committed the attached patch (rev. 168320) as obvious after
regression-testing, after discovering that expressions in subroutine
calls were not walked in frontend-passes.c.

I also took the liberty of doing some whitespace fixes at the same time.

	Thomas

2010-12-29  Thomas Koenig  <tkoenig@gcc.gnu.org>

	* frontend-passes.c (gfc_code_walker): Handle expressions
	in EXEC_CALL, EXEC_ASSIGN_CALL and EXEC_CALL_PPC.
	Separate cases in switch statements by blank lines.

2010-12-29  Thomas Koenig  <tkoenig@gcc.gnu.org>

	* gfortran.dg/character_comparison_7.f90:  New test.

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