Patch for bootstrap problem compiling tinfo.cc

[Mark Mitchell]

>>>>> "Richard" == Richard Earnshaw <rearnsha@arm.com> writes:

    Richard> The following patch fixes a bootstrap problem on
    Richard> arm-netbsd; I've based it on a similar patch by Mark
    Richard> Mitchell for preserve_subexpression_p().  The symptom was
    Richard> a segmentation fault when dereferencing block_stack
    Richard> because
    current_function-> stmt was NULL.

    Richard> <date> Richard Earnshaw (rearnsha@arm.com)

    Richard> 	* stmt.c (any_pending_cleanups): Don't crash when
    current_function-> stmt is unset.

I think this is fine.  But, would you mind sending me the stack trace
from GDB when this happenned?  I just want to make sure something
sensible is going on.

Thanks!

--
Mark Mitchell                   mark@codesourcery.com
CodeSourcery, LLC               http://www.codesourcery.com