[clang] [clang][analyzer] Fix the false positive ArgInitializedness warning on unnamed bit-field (PR #145066)

[Balazs Benics via cfe-commits]

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@@ -259,7 +259,7 @@ class FindUninitializedField {
         if (T->getAsStructureType()) {
           if (Find(FR))
             return true;
-        } else {
+        } else if (!I->isUnnamedBitField()){
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steakhal wrote:

I think I'd rather move this check to the beginning of the for loop and just `continue` in this case. That way it's cleaner as it follows an early-return (in this continue) pattern.

https://github.com/llvm/llvm-project/pull/145066