[Openmcl-devel] A bug and a quick fix

[CRLF0710]

Under Windows environment, CCL 1.7 will raise an exception when you click
on the close button of the console window, whose exception handler will
cause further memory access violation errors by accessing through NULL
pointer (TCR_AUX(tcr)) and cause a APPCRASH.

using this patch, we can prevent the later part of the problem(memory
access violation error), and make ccl exit silently. But i think it's worth
further investment into why the exception is raised and solve it from the
source.

Here is the temporary workaround patch.

(tested under win7 ccl 1.7-r15116M, not sure if the TRUNK version has the
problem.)

-- 
Wir müssen wissen; wir werden wissen!
CrLF.0710
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