[clang] [clang] Fix -Wdouble-promotion in C++ list-initialization (PR #159992)

[Marcel Jacobse via cfe-commits]

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@@ -12797,6 +12797,22 @@ static void CheckCommaOperand(
     S.CheckImplicitConversion(E, T, CC);
 }
 
+static Expr *IgnoreExplicitCastForImplicitConversionCheck(ExplicitCastExpr *E) {
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mjacobse wrote:

Added as suggested. Let me know if you'd like to see any more tests.

https://github.com/llvm/llvm-project/pull/159992