[Issue 15691] Improve error message for struct member initializer

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15691

hsteoh at quickfur.ath.cx changed:

           What    |Removed                     |Added
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           Keywords|ice                         |
                 CC|hsteoh at quickfur.ath.cx      |

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