Bug 20774 – Static arrays passed as dynamic arrays over varargs

This causes a mismatch between the caller and va_arg. Sample program: ``` void testVariadic(T)(int nargs, ...) { import std.stdio; foreach(i; 0 .. nargs) { auto arg = va_arg!T(_argptr); writeln(arg); } } alias StaticArray = int[4]; void test7() { StaticArray a0 = 0; StaticArray a1 = 1; StaticArray a2 = 2; testVariadic!StaticArray(3, a0, a1, a2); } ``` This prints: [4, 0, -1008992768, 32764] [4, 0, -1008992736, 32764] [4, 0, -1008992704, 32764]

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