[clang] [clang-tools-extra] [CLANGD] Do not crash on designator initialization of union (PR #83369)

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


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff 267beb10f2812107734a1cd2172b46e928af76b7 3d6afe011221ac239bb668b375ed3f6c356fc47d -- clang/lib/AST/Expr.cpp
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<details>
<summary>
View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index 33eeeda89f..4104fad181 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -4604,18 +4604,17 @@ SourceLocation DesignatedInitExpr::getBeginLoc() const {
   if (First.isFieldDesignator()) {
     /* search all designators in case the first one is not
        initialized */
-    for (unsigned int i=0; i<DIE->size(); i++) {
+    for (unsigned int i = 0; i < DIE->size(); i++) {
       Designator &Des = *DIE->getDesignator(i);
       SourceLocation retval = GNUSyntax ? Des.getFieldLoc() : Des.getDotLoc();
-      if (!retval.isValid ())
-	continue;
+      if (!retval.isValid())
+        continue;
       return retval;
     }
   }
   return First.getLBracketLoc();
 }
 
-
 SourceLocation DesignatedInitExpr::getEndLoc() const {
   return getInit()->getEndLoc();
 }

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https://github.com/llvm/llvm-project/pull/83369