[clang] [-Wunsafe-buffer-usage] Fix crashes in "Add check for custom printf/scanf functions #173096" (PR #174683)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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You can test this locally with the following command:
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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- clang/lib/Analysis/UnsafeBufferUsage.cpp clang/test/SemaCXX/warn-unsafe-buffer-usage-libc-functions.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Analysis/UnsafeBufferUsage.cpp b/clang/lib/Analysis/UnsafeBufferUsage.cpp
index 6b700355c..7c0eaa2e5 100644
--- a/clang/lib/Analysis/UnsafeBufferUsage.cpp
+++ b/clang/lib/Analysis/UnsafeBufferUsage.cpp
@@ -2257,8 +2257,7 @@ public:
     }
     // For printf-like functions:
     if (AnyAttr && libc_func_matchers::hasUnsafeFormatOrSArg(
-                       Ctx, CE, UnsafeArg,
-                       FmtIdx, FmtArgIdx)) {
+                       Ctx, CE, UnsafeArg, FmtIdx, FmtArgIdx)) {
       Result.addNode(Tag, DynTypedNode::create(*CE));
       Result.addNode(UnsafeStringTag, DynTypedNode::create(*UnsafeArg));
       return true;

``````````

</details>


https://github.com/llvm/llvm-project/pull/174683