[Issue 259] Comparing signed to unsigned does not generate an error

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=259
Issue 259 depends on issue 9960, which changed state.

Issue 9960 Summary: Show warnings/deprecations during template instantiation
https://issues.dlang.org/show_bug.cgi?id=9960

           What    |Removed                     |Added
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             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

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