[Issue 17758] assignment of different vector types should require cast

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17758

bitter.taste at gmx.com changed:

           What    |Removed                     |Added
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                 CC|                            |bitter.taste at gmx.com

--- Comment #1 from bitter.taste at gmx.com ---
The specification states the following about the implicit conversion between
vectors

> Vector types of the same size can be implicitly converted among each other.

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